I went there in May and enjoyed my stay. Was upgraded IIRC to an Astor Suite back then. I didn't have any concerns with the room except the fact that I didn't notice any Bose loudspeakers in the room that you come to expect of most St Regis hotels. A very nice spread at breakfast too.

It's a very nice property with a huge pool. It is however a way out of downtown Doha and the corniche. I didn't find this was a problem as I split my time between the W Doha and this property (I love both brands and couldn't make up my mind).

I would say the St Regis Doha would be as close as you can get to a resort whilst still being very close to downtown (not that downtown is very far either).