I have two Tetratec EX1200's, a Tetratec EX600 and a Rena XP2 ATM. All very good filters IMO. The Tetratec's are fractionally easier to use though. I'd be happy to buy either brand again
Too bad rabbut had a bad eheim experience once or he'd probably still be running a few But we're lucky to have him as a person who will be balanced in his comments and has some good extra experience from the shop hours.