When buying, consider whether you will use the Domino on larger projects; meaning bigger furniture or possibly outdoor projects like large arbors. I bought the 500, believing I would never really need to use the larger Domino tenons on anything and because the 700 seems cumbersome to me, especially for smaller projects and cabinet work. However, I can see the possibility of larger projects now and would now, of course, have to buy the 700 separately. That's not a bad thing since you get the best of both and you can use the bigger tool for bigger projects. It's just a lot of money to spend on 2 tools. Go to a store, if you can, lift them, and try them (if possible). Also, you can always send whichever you buy back within 30 days. There is supposed to be an article in an upcoming Fine Woodworking issue which deals with using the Domino for furniture making (not sure which issue). They do use the 700 and the only other review I saw in FWW also reviewed the 700. Look for that article also. It was good.