I have #14 still unboxed and will probably stay that way. My cars are digital and have working head lights, tail lights and brake lights. The digital sets allow many cars on the track at a time, but the analog sets are very fast and competitive as well. When I started collecting, I would purchase sets, track and many pieces over the last few years. I have lots of extra pieces and a couple of extra sets to part with as my track layout is complete. I just need to finish the scenery.