That is a good question, I had no idea about the item until I face a player using it online today. Really the boost it gives isn't that significant. MB does a 10% increase to Phys atks at no cost of choices or HP. Choice Bands make you choose, so obviously a powerful Spc sweeper can only really pull that off. And Life Orb is a 2nd STAB at the cost of HP. Now Life Orb is totally off topic yes but it is relatively the sam as this.

The best part about Choice Band, is if you do go up against a ghost type, you can switch out and when you go back in you get to select again, which really does further the ability to sweep with it. If you switch to a great tank you will take relatively no damage and get to go back in and attack again.

Down side is swithching for choice band, no one likes taking hits the opponent gets for free.

MB is "ok" any boost to power is good, but a item such as leftovers is far surperior to it. 10% just really isn't all that much, it wont boost critacal hits or accuracy so its not as benefical as other Items.

Life Orb is what I chose, I have it on my Electivire and my Porygon-Z. Electivires only weakness is ground, so a good EQ will OHKO it therefore losing a little HP for 2nd STAB on all moves is good for him. With his ability Motor Drive he can gain a good speed boost and succesfully sweep at least 2-3 pokes. Porygon on the other hand gets a Hyper Beam atk with 911 damage from Life Orb, STAB, and Adaptability. With max Spd EVs its ok to lose HP because he isn't getting hit anytime soon with HB being a finishing move. He is also my BoltBeam sweeper with 2 STABs he is the best Spc sweeper in my opinion.

For the three I recommend MB last, CB 2nd, and Life Orbs if you don't care about HP for that poke.

Yea muscle band is lame, just like those element boosting items except for all physical attacks. But the CB allows u to come in with a 1.5 atk boost constantly. No taking a turn to bulk up, swords dance or DD, just enter and sweep. Being left with a CBer as ur last guy does have its faults, but thats not how the CB is properly played. Certain pokes CB better than others. good pokes to CB are Heracross and Salamence, as their defenses are too fragile for life orb to be effective and they can all find good opportunities to switch in, KO and leave. The CBers are not the most resilient of pokes, thats why the CB is so good for them, because they wont last long and they can just wreak havoc to the end. Life orb is a good item for a poke like Electavire, though expert belt is probly the better choice since he can hit super effectives on 13/17 types. Also, its not an extra stab, its a 1.3x bonus, but thats much better than a measly 1.1x bonus from muscle band.

also, please, no one use hyper beam, or any other recharge move (unless ur using slaking).

Are you sure^^^^? Because most people say it is a second stab when you use life orb

Actually Life Orb is a second STAB. It does boost 1.5x, I have seen that in so many places.

Also, HB on my porugon is unreal. 255 EVs in Spc atl on Modest is 405 Spc Atk for pory. Then I have Life Orb, Adaptability, and STAB on HB making it 506.25 power.

506 + 405 = YAY, of course I only use that as a finishing move, pory also makes the best Bolt Beamer I have ever seen.

Another thing, HB on slaking. Im not sure ut I am pretty sure your ability does not count as a recharge turn. Now I am NOT positive but I am pretty sure it will say you must recharge on his next turn making that the worst move ever. But psypokes does have it for a moveset move so I really dont know.

But I am virtually certain Life Orb is a 2nd STAB just like all the CBs. Just that it costs HP to use.

http://www.smogon.com/forums/showthread.php?p=392715#post392715

Thats where i got my life orb info.

On slaking, the recharge and ability work in the same turn.

For porygon, true thats a lot of power, but u forgot to divide it by 2 since its a 2 turn attack, which makes it 195 attack power over 2 turns, where as tri attack under the same circumstances is 208 attack power in one turn. Also keep in mind that tri attack has 20% chance of cuasing freeze burn or paralysis, has 10pp and has better accuracy. Boltbeaming is great, but more useful just for those resistant to normal.

I will definetly look into that Life Orb, even though that post you linked is extremely accurate I am going to go to other sources as well to get the majority opinion.

The HB combo on slaking is great then, no poke could use HB better. And gain I use HB strictly as a Finisher move. Honestly no one has ever gottenme down to Porygon-Z as my final, I only send it out to get a OHKO and finish the fight.

I also looked into Tri-Attack, and it is good I agree with you there. But it's not what I need, agaon HB is strictly a finishing move for Porygon does not have the Def to take hits. His speed and Spc Atk are what make him good, honestly recover is there because of the Life Orb and I have never used the move. The boltbeam on Pory are enough to sweep most pokes even if they aren't weak to it.

Well, mathematically:

Let's say, for the sake of example, that your move did 100 damage, and you had STAB but nothing else. The you would do 150 damage. Now, if you had life orb, you would do 150 x 1.3 = 195 damage. The STAB added 50 damage, and the orb added 45 damage. In other words, when you already have a STAB, your orb would be very close to a second STAB.

As your un-modified damage decreased, the boost from your orb would approach the boost from your STAB, and as your un-modified damage increased, the boost from your orb would be farther away from your STAB boost; that is:

The limit as un-modified damage approached zero of the orb boost damage is the STAB damage.

In my opinoin its Muscle band but the Choice band has advantages with
1.5 attack boost but you have to strategize with it.

same go for MB its not worth the using that one attack

Usually, it is.

ife orb is a good item for a poke like Electavire, though expert belt is probly the better choice since he can hit super effectives on 13/17 types. Also, its not an extra stab, its a 1.3x bonus, but thats much better than a measly 1.1x bonus from muscle band.

A REALLY good choice band option that has a lot of coverage is Gallade, Using drain punch so that he can just leech life and hit hard, high speed and has enough hp to tank a hit.