The hotel is located opposite the Marriott and backs on to the seafront. There is a pool. Clean but really a flashback to the 1970s. IHOP nextdoor for breakfast. Also GoldPOints Gold - and was treated no differently that the dog on the street. I have nothing more positive to say on the hotel...
On the other hand, I have stayed at the O'Farrell Hilton a number of times and would go back in a flash. And the price sounds good too. Nice hotel, good staff, great location.
Or, you could use your Marriott points and cross the road to see the Radisson, and see if I'm right!