Issues, from the initial offering, were:
(1.) track-joiners that were too weak. Atlas replaced my track joiners, with a much better product. Those buying new Atlas, would find the track joiners, a bit difficult to work-with. If you purchased (Used Atlas track) you may want to change the joiners. Joiners are sold separately.
(2.) Through-continuity of switches, was corrected.
(3.) Switch motor burnout was corrected with the 6924 relay board. 6924 boards, also corrected the spring-loaded non-derail feature.
(4.) IMO. Note: When you attempt more complex switching, with Gargraves, and Ross, there are, additional wiring, and functions, using relays, similar to the Atlas relay board.
(5.) I like the Atlas track screws.
(6.) A search of the Atlas track site would yeild an interesting set of track end pieces for making custom-cut pieces.
(7.) Atlas flex track is a bit more rigid than I expected. Difficult to work.