I use 5-6 scoops of ICE with a tsp of glutamine for during workouts. I love it, I also add 1 scoop of ICE to my post workout whey protein w/glutamine. I have Xtend but have not tried it yet, waiting for the ICE to run out. My only thing about the Xtend is the creatine. I know the citrulline malate is in it & I know that creatine is only stable in water for 7-10min; so unless the citrulline malate is different than other creatines, then as a during workout I don't think it would be a big plus over ICE since workouts last 45min.- 1 hour. now before or after workouts would be good. Like I said though I have not seen a lot of studies on CM to know how long it is stable in water. I bought the Xtend because I was low & I needed to purchase ICE but Xtend being $5 more( basically the same thing accept the CM) & getting some free CEE from a special going on I said screw it I'll give it a try. I love ICE though & would recommend it, I have fruit punch & like it. many say grape is better tasting but the fruit punch has a little more BCAA's in it so that is the route I went. If something is good & works I'm not going to cry about the taste.