Offset feels about 10ms early, or maybe I'm just nuts. My accuracy goes up if I use a +10 custom.
Medium:
I don't like the giant hitcircles, it usually makes maps harder to read for me, and I remember it was especially hard to read giant circles when I first started playing osu!
The map lacks hitsounds from 0:55:877 to 1:27:073, while the rest of the map has plenty. Not sure if this was intentional or not.
Expert:
00:13:92 - seems odd that there isn't a circle or slider end point here, but I've never played ITG so whatever
Everything generally seems fine.