I've had them several years, and the wood was looking scratched, dinged, and dry.
I've seen some of the furniture Mr. Modtomic has given new life to over on his blog, so I picked up a can of this Howard Restore-A-Finish and some Howard Feed-N-Wax.
All you need to do is dip some extra fine steel wool in a small puddle of the Restore-A-Finish and rub it into the wood. Wipe off the excess and let the piece sit for 30 minutes, wipe again, then with a clean cloth wipe on the Feed-N-Wax. Rub the wax in well and you're finished. One of the two chairs has some rough spots that I may eventually go over with some sandpaper, but for now, they look a heckuva lot better than they did before.
I think this stuff works great and it's easy.
Happy Thanksgiving everyone!