I have been using Xtend, but I am just wondering what everyone else is using?

I use NSI brand from VitaCost (http://www.vitacost.com/NSI-BCAA-Branched-Chain-Amino-Acids-Powder)
Seems to work but is tough to mix with water I usually throw a couple of ice cubes in with it and the water and shake.

I think from what I've read, Xtend and ICE are the two most recommended for flavor and mixability.

I've also done bulk, but I don't mind paying a bit extra for mixability and taste.