We've stayed in every
DVC at WDW (except the new GFV), and SSR is hands-down my favorite.
First, it's an absolutely beautiful resort. It's not heavily-themed like some of the others, but is very picturesque and peaceful. The decorating inside the rooms is classy, with a few Disney touches added during the recent refurbishment.
The layout of the resort is very similar to a condominium development. The rooms are in individual buildings, with parking around each building. The hallways are open-air, which is another complaint you'll sometimes hear about the resort. Don't get the mental impression of a Motel 6, though. Just note that it's different from a more-traditional hotel layout, such as at BLT, BWV, VWL or BCV where there's a central lobby with hallways and rooms leading off of it.
Some people are thrown by the sheer size of the resort, and the fact that it has six sections. Regardless of the section you're in, though, you're never really very far from the amenities. One of the benefits of its size is the fact that the resort offers so many amenities. Two themed pools, with life guards, water slides, and daily activities at each; two kid's interactive water play areas; three quiet pools; a playground; tennis courts; golf course; shuffleboard; horseshoes; fire pit w/ daily marshmallow roasting; bike & surrey rentals; jogging paths; a community hall; arcade; 3 pool bars, a lounge, a sit-down restaurant (dinner only), and 2 counter service restaurants; pool tables; 3 laundry rooms, and more that I'm sure I've missed.
If you have a car, the parking is convenient. If you're using Disney transportation, you'll find that the travel time to all four parks is about the same. The resort sometimes gets a bad rep for its busses, but we've never had any transportation issues at SSR. (Yes, we may have had a bus or two that took more than 20 minutes to arrive, but no more so than at any other resort we've stayed at.) There are 5 bus stops within the resort, but the resort doesn't share busses with any other resort.
Several previous posters have mentioned the walk to Downtown Disney. This is definitely one of the resort's big plusses. However, be forewarned that the construction in Downtown Disney has closed the primary path between SSR and DTD. It's still very convenient to get there, though. There is an alternate path, the bus, or the boat.
Enjoy! It's a great Disney resort!