Yeah I eyed them up when they first came out, but it wasn't long before the bad reviews had started to roll in, and luckily I didn't have the cash at the time. lol
There IS a plastic FV of an ilk that is probably quite good, made by Spiedel, called the Kellermeister. However given that the 30 litre one costs about £217 (almost £218), it's actually more expensive than just buying a stainless steel one. I genuinely can't think of a reason why anybody would chose plastic over steel unless the plastic one was a lot cheaper... lol
Sorry that you had already taken the plunge and bought one. If you look around, there are posts about how to solve some of the issues with them.