The DSTT isn't a bad flash cart and for some people might even be the best choice, particularly for children who can't navigate folders very easily. But compared to other flash carts in its price range, it lacks the most basic features, like sorting the games alphabetically and being able to navigate folders, the loader is updated very infrequently, and its menu is laggy when you have a large microSD card. YSMenu fixes some of these problems at the expense of a very basic-looking menu without good support for the stylus.
In short, for most people there are much better flash carts out there for about the same cost, like the Acekard 2.
-Bri