I have seen the unit demonstrated at my LHS and it is slick. The RailPro is radio based as no info goes through the rails. The 2-way communication between Ring's decoders eliminates the need for speed matching in multiple locomotive consists.
I interviewed Tim Ring for a podcast in December (on iTunes) and he is an interesting guy. His company has been around with other products for over 10 years.
Price wise, his product is comparable to others. His base decoder has sound built in but I believe non-sound versions are about ready as are stationary decoders for accessories
It is a relatively new product that has not been on the market very long. From their advertising and some videos I've seen of it in use, it is an attractive alternative to DCC but is very pricey because of the single-source supplier, and there's always the risk of them not surviving.
I was just looking at the Ring Engineering site and the product offered looks rather interesting. Does anyone here have any experience with using it?
Choo Choo Willie
CDN Dennis
Modeling the HO scale something or other RR in the shadow of the Canadian Rockies Alberta, Canada