I use Accucraft couplers and have no trouble at all. I think they look better than Kadees. When I was in HO I used Kadees exclusively. When I switched to 1:20.3 I bought some AMS rolling stock and liked the Accucraft couplers looks. I tried them out and they were operationally good, so I never converted to Kadee. I bought Accucraft couplers for my Bachmann locos as well and almost never lose a string of cars. If I do, it's usually due to track issues.