Works great, love that I can control multiple collars at the same time! Wish they wouldn't turn off after 8 hours (would love for them to work first thing in the morning when I need them the most) but the batteries last longer than any other I've ever tried! The remote really does last 45+ days!!! The collars definitely last about 15 days which is 2-4x the length as others I've tried! Definitely worth it!