Kinda weird. Some have trouble with protanks (me included so I hate them) and some have no trouble with the i30. (I love them)
I don;t think it is necessarily problems in all cases. I tried the iClears and just don't think them. I think a big part of it is what kind of juice you use. Especially involving how sweet they are. None of my juices are overly sweet so I find the bigger tanks give a muted and watery taste,

