I have been wavering in my opinion of using the HRRR for accumulations/qpf. It literally seems to change every hour. Temp's have been ok as have location of features, within 18 hours, but it seems to pop up areas of heavy precip that do not materialize sometimes. This was my first winter really using it and I am a bit disappointed with that aspect of it. It does a great job during hurricane season.
I do want to add that big picture I think the Nam has done well this storm. Not enough time to break it out but just the orientation of the snow, frozen, rain line right now. GFS did pretty well the last few days as well. As usual the UK was terrible when it came to snow accumulations.