I've had a Garmin 550, liked the collar, loved the light on it. I got in 5 years ago or so and the battery didn't last very long at all in the cold. Then I made the switch to a Dogtra Edge RT, very similar to the 550 and is much more consistent than my 550 was. I really like the RT and 550 for training, however for hunting I do not like that big transmitter. It seamed like it always got in the way for me. This summer I picked up a used ARC at a good price. I really like the ARC for hunting, transmitter is small and stays out of the way, holds a good charge. I do miss having several different settings at my fingertips, but the small transmitter makes up for it to me.