No direct experience but high regards from a Trek employee who has one (my brother).
Comparatively, I have an Allant 7s that is a bit heavier but just as nimble and quick. Also have Allant 8s and Verve+3. I would definitely consider the FX+7s given it all of the quality componentry and very strong motor. And it is a Class 3. Definitely get the s.
My only advice is to add the range extender battery. You will definitely want to ride the bike a lot and you may find 360watts a little shy if you also grow fond of Sport and Turbo modes.
I have ~15K miles on my 3 Treks — my wife has 2 Verves including the Verve 4s. We have never been stranded or disappointed in any of our Treks.