Gaining

I have used Universal's Gain Fast (chocolate flavor) in the past with fluctuating success.
I must admit; it is expensive and still, a lot depends on your metabolism and your further food intake.
But it's one of the best tasting ones(some cheaper shakes can taste horribly bitter), and it doesn't seem to be designed for athletes who want to gain muscle mass WITHOUT fat.
Just keep in mind that it's supposed to be used BESIDES your normal food intake, but since it fills your stomach like cement, I've found it hard to eat normal.
If you gain easily on "normal" food, I'd recommend you to stick with that.
But if you're serious about trying a weight gainer with the purpose of gaining fat, this one I can recommend...
Good luck with your choice and keep us informed about your progress.

Paul/ IMW