My sister owns a DSTWO which I rather like for its many features and GUI but it can drain the battery quite fast and the plastic feels cheap. Below is a list of all the features I am looking for, rated from most important to least important. 3DS compatible. Reliable & supports all Nintendo DS ROMs (especially the Pokémon games). Manufactured with quality plastic. User-friendly & aesthetically pleasing GUI. Other miscellaneous features. Battery life. If the DSTWO truly is the best flashcart, then I would be willing to purchase it. Although ideally, I would prefer something more solid, with an equally nice GUI.