The collars themselves are very nice so I'm going to give them a good rating, but --WARNING--if you are planning to use with the Dogtra e-collar, you might want to think again. I had an extremely difficult -- I would say verging on impossible--time getting the Dogtra unit onto the collar. By the time it was on--pulling with pliers,etc,--the collar was pretty messed up, although still usable. The bigger problem came when I had to return the Dogtra units for repair/replacement.* GETTING THEM OFF THE COLLARS WAS A NIGHTMARE! My husband had to cut and poke and I don't know what else. Suffice it to say, I no longer have the collars because they had to be cut to bits. The collars are just too tight for the Dogtra. Again, nothing against the collar itself--I don't think they are ones promoting use with the Dogtra, although I'm not sure about that.
As I recall the collars--for the brief time I had them, the colors are bright and great and the way they lock on and off makes them a breeze to use. I like the fact that the excess length of the collar goes underneath, as opposed to flapping around on the outside like most collars. That gives them a nice, clean look. They seem to be very well made. Trust me--through all the pulling and cutting we ended up doing as a result of the Dogtra unit fitting too tightly, these collars are TOUGH!
*Also not a critique of Dogtra e-collars; I bought 2 and I think there was some confusion--perhaps on my part. The Dogtra company was very accommodating and easy to work with. Problem solved and I am pleased with the product.