The Radisson Fort George is a good international-style hotel. Two pools, cable TV, friendly staff. The rooms in the executive tower are especiallyn nice and have views of the water. As Stephi says, it's a Radisson and not particularly representative of Belize hotels. For something more local in that same area of Belize City, try Colton House (a wonderful little B&B -- without the breakfast, though), The Great House (restored 12-room colonial house) or Four Fort Street Guesthouse (lots of atmosphere and very good restaurant).
I've stayed at Jaguar Reef Lodge a few times. It's not in the Cockscomb jaguar reserve but about 15 miles away, on the coast near Hopkins village. It's a nice place, with large rooms in duplex cottages, pool, good restaurant (though expensive). Sand fleas here can be pretty bad at times. It was for sale but the owner has taken it off the market and is thinking about expanding it. If you want something smaller, Beaches and Dreams is a few hundred yards to the south and is nice little place on the beach, with a good restaurant. Both places are fairly expensive in-season but are good values off-season.
Belize First Magazine http://www.turq.com/belizefirst/