I like the dogtra but it is now 3 yrs old and I had to put new batteries in it last fall. It is now sticking on and running down, but it has been used 4-5 times per week. I may can get it fixed but I am getting a new one of some sort may be a dogtra I am checking all options.
For what its worth... I've been using my Tritronics Pro 200 EXP for about 4 months now and absolutely love it. I have heard that there may be problems with them (the new EXP models) - but I have yet to experience any issues at all. I thoroughly like the collar.