RG353V has served me incredibly well. Works great for systems up to Dreamcast. Plays most PSP games well. Plays DS and earlier Nintendo handhelds perfectly, though I strongly recommend using Arkos if you touch support in the Linux frontend.
It's just a smaller, folding form factor. It's better at protecting your screen and buttons, but if it's anything like the GBA SP it's based on, that hinge is a potential breakage point. Your trading off one kind of durability for a whole new vulnerability. Having said that, I loved my GBA SP and in only got broken because it got misplaced and sat on while it was folded open.