I bought two of these, one for myself and one my wife. We've both got countless hours of enjoyment out of this handheld console. The larger screen on the XL is great. It has a good weight to it, and feels very well made.
It doesn't hurt that the 3DS currently has a great catalog of games at its disposal, as well. Since my purchase, it's hard to remember a time that I haven't been eagerly awaiting at least one new release on the horizon.