Great if you're tall
I'm 6'4" and I booked this hotel mainly on its reputation for large beds and I wasn't disappointed, easily the most comfortable hotel bed I've slept in for years. I could have been a couple inches taller and my feet still wouldn't be sticking out the end.
We got a slight upgrade on arrival, so I can't comment on the standard rooms, but our corner room on the 23rd floor was big by western standards and positively enormous by Tokyo standards.
The location is perfect, about 300m from Shibuya station but on the opposite side of the station from the main crossing area, so you can easily avoid the crowds.
I'd absolutely recommend this hotel, it's great.