Good in principle, but going by the pictures I am not convinced it would be at all maintainable, either mechanically or electrically, especially once the track is laid and/or ballasted. It wouldn't take much grit or similar to fall in and cause havoc with the leadscrew mechanism. Equally, not sure their claim of no drilling etc. holds up to much when you apparently have to rout out slots and complete areas to accommodate the tiebar mechanism and DCC Decoder board from above instead. I would rather see the decoder on flying leads to give at least some accessibility to all the connections and more options for mounting.