That said, the two screens really give you plenty of real estate to work with, and games like the Brain Age series -- or any game where plenty of writing is required -- really benefit. We loved scribbling notes on our interactive map in The Legend of Zelda: Spirit Tracks and appreciated the abundance of room to write when designing games in WarioWare DIY.
Playing games on the DSi XL is a slightly different experience to playing games on smaller systems like the DSi and DS Lite. The device's weight and bulk mean you may need to grip the system in a way you're currently unaccustomed to. You'll also have to get used to the fact that your hands are further apart, which may make for an initially awkward acquaintance period. But, after a few extended sessions, you should have no problem getting used to the bigger design.
Although the Nintendo DSi XL's huge screens offer plenty of advantages, they also make the system less portable, and some text-based games look blurry. Ultimately, the DSi XL is exactly the same as the cheaper DSi, so, unless you're desperate for more touchscreen real estate or your vision is impaired, we can't recommend buying one.
If you've been waiting to upgrade since the days of the original DS, we'd still encourage buying a DS Lite or DSi. You may even want to wait for the forthcoming 3DS, Nintendo's new portable gaming system that offers 3D graphics without the need for glasses, while still being compatible with DS games.
Additional editing by Charles Kloet