Yes. A weight gainer, in my opinion, is only good when used occasionally to substitute a normal meal. This is when you are on the road etc. and you have to carry "a meal" with you.

Weight gainers and fat burners are something people buy a lot without questioning their effect. Also, with fat burner drinks, you dont really loose weight with drinking something. Caffeine, taurine etc. in a drink may push up your heart rate a little bit, which, in result, bring a littlebit higher calorie consumption, but that is very mariginal.