For me it seems that Lionel have attempted a 'one size fits all' solution and in reality it has created a lot of confusion and in reality something that doesn't meet anyone's real requirements without additional extra work and costs.
It looks like they will have to do a lot of additional re-work to now come up with two solutions that will meet two distinct groups.
With regards to operating on AM track, I don't have any, but on a basic loop it should work as on Lionel's Fastrack as is now but on turnouts that could be an issue. I am intrigued that no one on this list has responded what the outcome is, can anyone confirm this?
Also, with Gargraves track I would say that there may be some real issues here as this is Lionel 'O' gauge style track with a rounded top and I can't see the new wheel sets working well, is there anyone that can confirm this.
I also am intrigued as to how they pass through ACG turnouts as well, again, is there anyone in this list that can give an update on how they perform on the old ACG track system?
