This is definitely a nice gem.
First, it's easy to reach, just 30 mins from Sapporo center. We took an online pack bus + lift from Kamori Kanko. Hit the slopes more or less at the opening and left just after sunset.
The place is well organized, with everything (rents, lunch, etc...) in the same place.
And yes, it's a small mountain. Just one high speed hooded lift to access everything. 500m vertical. But the snow is really deep and light. Plus, it's steeper than most Hokkaido.
Kitabake (the narrow black run with trees in the middle) is a must do; magical. Freeride seems plentiful (not tried).
The best kept secret in Hokkaido! Top class steeps 'n deeps 20-30 mins from central Sapporo! The runs are short, but the uncrowded slopes and easy access to virgin Hokkaido pow more than makes up for the shorter runs. As the grazing herd stampede for Niseko, Sapporo Teine sits in front of their face and they run right by. Ride uncrowded powder/slopes, head back to your hotel then enjoy apres in the bustling drinking spot of Susukino.....you'd be mad to miss Teine out!