The WetlandHunter 1825X has been a very good product. It is very easy to change between multiple options depending on your training style. If you follow the manual, it's a great aid. My dog gets super excited if I even touch the collar because he knows we are going to go have fun. Battery lasts multiple days (2-3 hours per day) and charges easy. The only complaint I have is the levels of stimulation. There are basically 3 levels of 7. So a level 3-1 is not as strong as a level 1-4. Not a big deal but I would prefer 21 increasing levels. That being said I only use level 1-6 and just the tone 95% of the time now that my dog is use to it. Both the transmitter and receiver are small which I enjoy. So far after 3 months of daily use, I love it!