As I have posted here before, MTH Realtrax is a very bad choice.Realtrax switches have also been problems. Realtrax is bad stuff...period.
I can tell you from personal experience with both Realtrax And Fastrak that I've never had issues with either and I've been using Realtrax since it first came out and never had an issue of any kind. If and when I do re-do my layout it will be with tubular mainly for the Magnetraction which is useless on Realtrax and Fastrak since I have a pretty large fleet of postwar engines that have it. I have no real issue with Fastrak but with my investment in tubular and Realtrax it makes no sense for me to switch to a third option.