Chastity device recommendation

Hi all, we are looking to introduce some chastity play into the bedroom and are thinking about the CB6000, but just concerned really of the fit as some reviews say its good, others that it either pinches or can be easily removed, not really clear how things should be measured when choosing. Also what it feels like, especially when aroused, on a man of average size who is a grow-er not a show-er! We aren't planning on long term chastity, nor overnight locking away, just play sometimes during extended bedtime fun when the wife will be in complete control. Any other couples using one or anything similar?