I remember using that stuff a few years ago, If I remember right it doesn't mix too well and the scoops are friggin hyooge and it has you use like 3 or 4 of em. I know for me if I had one of those right before the gym id be workin my abs with my head in the toilet.
Before bed could be helpful it looks like a lot of their protein blend is coming from milk protein so the casein would be a plus. Just depends on how concerned you are with all those extra cals right before bed butttt this is in the bulking section so do it up! You could also throw it in during the day between meals after your workout but it will def fill you up