I also recommend them. Their fit, strength, and feel are all excellent. You have to look close to know they are covers, not the real upholstery.
On the advice of posters here, I ordered the "N6 Beige Velour" to go with the tan stock interior that comes with a Seaside car. When I pulled them out of the box in the house, they looked WAY too dark. But when I laid them over the seats outdoors, much to my surprise, the match was nearly perfect! Must have something to do with the way the grain of the fabric reflects different light differently.
Now I just want to get some of that same fabric to cover the door armrests. The kit came with pieces for the headrests and the center armrests (even the little filler pieces between the back seats and the doors), but the door armrests look like they will get dirty and worn fast.
Installation took about two careful hours for all four seats.