The Cavalier seats work great as many have said before. There are several things to keep in mind:
1. There are two versions of the seat risers that Jeep used. The early ones (pre-'91? I think) are not direct bolt-ups, but the later seat riser version is a direct, exact fit. Mine is a 1993 so I can say for certain that the later factory seat riser bolt holes line up exactly with the later model Cavalier seats without any problem whatsoever. Getting those bolts out of the factory seats are another problem altogether though as explained below.
2. The torx bolts on the factory seats are both junk and also usually rusted solid. I have a rust free SoCal Jeep that was never off-roaded or otherwise used in wet conditions and still I needed to use an impact hammer to take off some of the bolts, so be ready with the PB blaster.
3. When you remove the GM seats (many models from the Cavailier to the Sunfire, Bravada, etc. will fit as I am sure someone else will reproduce a comprehensive list), make sure that you take the bolts that mount the new seats to the GM seat brackets, as you will be reusing these if your smart.
4. Get the two-door model seats, since they have the flip forward feature that makes them ideal for Jeep use, especially if you have the flip-up seat risers.
5. Many people complain about the headrest mounted seat belt holder since it will limit reclining the seat since it will impact the roll bar behind the front seats. Me personally, I will trade a little recline (that I seldom use) for the convenience of having the seat belt retained in the clip and not getting stuck in the door when I close them. But if you like to recline further, you can remove them pretty easily by taking off the headrests and slipping the brackets off.
6. One final cool tip, is that while your there at the junkyard you may as well pull the rear seat (top and bottom) and have an upholstery shop recover your factory rear seat so it matches the front.
All I can say in the end is do it! This is by far the best bang for the buck mod (except for maybe the 20 gallon fuel tank mod) that you can do for your Jeep. Totally makes it feel like a modern vehicle and is far more comfortable and looks great. Plus the seats work great with most aftermarket center consoles, so no real concern there.
One more thing, if your factory seats are in decent condition, try not to destroy them when you remove the brackets. I was able to sell mine on ebay for $150 and I only paid $120 for both front and rear seats (for reupholstering my factory flip-and-fold bench at some point) so other than a little time, this mod pays for itself including gas to the yard to go get 'em...so go get 'em!