Watched it, liked it. I'm not sure it will be as good as other HBO offerings over the years. I think it's in the 7.5-8/10 now. A lot of the stuff in the show seemed like a wink, and a nod to Scorsese's other work too much. The costume/props deportment and location scouts all did wonderful jobs.
I loved Dice Clay in it, but it was more just Dice being Dice more than anything else. Also like the up and coming female A and R, and the early 60's flash back plot lines.