I am using HEM 1 on Zoom on Pokerstars.
I have found a couple of problems:
First, I cannot see the players I have played at Zoom in the player list (in fact, the stakes I played Zoom at, but didn't play non-Zoom games did not appear in the stakes list.
Second, some stats do not populate in the HUD.
In particular, "fold to 3bet" and "cbet" don't seem to show for most players. They are shown in the popups.