New and Clean, But a Few Drawbacks
I've stayed here twice and would stay again. If I could I would have given 3 1/2, but I averaged up.
Pros:
*A new, modern hotel. That's hard to find in S.F.; there's many older properties in town. The first time I stayed, I paid for one of the more premium rooms. First night was too noisy from street traffic, so moved to a different room. Sweeping views of downtown from floor length windows. Nice bedding.
*A nice brunch on Sunday.
*Cozy yet sleek bar in lobby. Pretty good spa; used twice. Check for spa deals! I got a great one. 
*It's just south of Union square (SOMA). I don't like to stay on Union Square, which is too noisy and a lot of small, over-priced hotel rooms, so location is preferable to that. However, it's kind of a walk to anything. Lots of new good restaurants have opened up in the area. Try Oola on Folsom. Also good for bar and food scene is RN74 on Mission St. If you're a woman walking by yourself at nighttime in this area, just be aware, but not a cause for alarm. Homeless and mentally unstable people are usually harmless. Stay to the east side of the area; SOMA west of 4th Street can get a little dicey.
Cons:
*Second time I stayed in a standard room. Not much to say about it--it was just kind of there. A standard hotel room, for about $250.
*Food is pricey. I admittedly had a very, very good burger at the bar, and a great glass of wine. They offered only one pinot noir, which I ordered without looking at the price. A cheese burger with fries and a glass of wine came to $38. Not including tip. Not kidding. That one choice of pinot noir was $18 a glass, I believe. Guess I'll ask to see the wine list next time.
*The breakfast on a weekday (for businesspeople staying at hotel) was nowhere the caliber of the excellent, original brunch on the weekend designed for locals, likely. Yet still very pricey. It's like it wasn't even the same restaurant. 
*Both times I stayed--BOTH--they accidentally charged something to my room bill AFTER I checked out, and both times I had to contest through my credit card company. The first time took longer for a refund (an extra night--I think there was some confusion at booking), the second time was a completely random charge for like $40, but it went swiftly. Just odd it happened twice.