I have the EZT Plus 1000 one dog and think it's great. Never had any problems, the batteries hold a charge forever (both the collar and remote are rechargable) and the range has never been an issue. Even with the stubby antenna (it comes with two).
Granted I've only had it about a year, but I haven't had a single problem with it. My only regret is that I wish I would have bought the two dog model.