I can't say enough good things about Niseko United, and specifically the Annupuri side. I've been riding in Japan for three seasons and I've never experienced anything quite like this. We spent a half a day on the Grand Hirafu side and then went over to Annupuri and never looked back.
Grand Hirafu was slightly crowded; not terrible, for the time of year, but crowded nonetheless. Annupuri was basically empty. No wait time for the lifts, no congestion on the runs, beautiful snow conditions and just FANTASTIC off piste options. After the first day, and we rode Annupuri for five, I was barely even seeing the groomed runs. We were ducking off at first opportunity, down into the trees, cutting through little valleys and ravines with pristine, untouched snow. It was truly fantastic.
The food was good, a little expensive but everything in the are was. Lift tickets were very reasonably priced for what we were getting. If the opportunity presents itself again this season I'll be back in a heartbeat.