Before arriving in Hong Kong, we had been sleeping in hostels, at other people's houses, or on trains. The Salisbury was a pleasant change.
The rooms were in pristine condition, with all the usual hotel amenities. For the money, I thought it was really good. It wasn't a lot more than a higher-end hostel, and it's in a great location--right on the bottom tip of the Kowloon peninsula, in the thick of all the shops and only two minutes from the Star Ferry across to Hong Kong island.
There's a gym there (which costs extra) and a swimming pool (included, with Jacuzzi). There's a restaurant downstairs which you get discount vouchers for, but you're better off stepping out into the throng of other options outside.
I can't vouch for all the rooms, but ours had a great view over the skyline on Hong Kong island.
For a hotel in such a central location, the Salisbury is definitely worth the money.