Kadee Couplers vs. Aristocraft

I have a LGB, Bachman, USA. and Aristocraft (more than 50% is Aristo). Since the different mfgrs don't mate with the others I chose Aristo knuckle couplers. When I would go to my local hobby shop to buy some Aristo knuckles I was told I should go with KD's (I had experienced KD's for 40 yrs in HO, knew they were good) because the KD's worked better and he sold the KD's for less than the Aristo's but I thought I would stick with the Aristos but after a couple of years I found the Aristo's to start failing in either trying to couple or uncouple. As a result I then replaced all ( lucky for me I only had about 30 cars) the Aristo knuckle couplers with KD 831's (due to some cujrves & turnouts), more $$$$ wasted. I should have gone with KD's from the beginning, I'm so much happier now with the KD's, both coupling & hand uncoupling is so much easier.