At 7 months post-op I'm at 5" of depth, I started with 6½ which obviously I was very happy about and I think the loss of depth came from being fairly gentle with the dilators, that last half inch tended to feel sharp and I was quite worried about overdoing it and risking granulation tissue.
I'd been down to something like 4.5" and realizing that's still ok but not what I want, for the last month I've been pressing depth pretty hard and it seems to be paying off. This makes sense, the neovagina is created by what surgeons call blunt dissection -- basically using fingers or a problem to separate tissue.
So I'm hopeful to be back to 6" I'm deep enough as it stands to take almost any penis I've ever seen, however I can't quite hold in 2 been waiting balls and that's something I want, also I'm not quite deep enough to fully insert most toys (which are mostly larger than the average guy).
When my GF bottoms out during strap on sex (doesn't happen in all positions), it feels fine, definitely no sensation of hitting anything hard and if it's sometimes on the edge of pain, I like that ok in sex.