So I picked up Mega Man ZX this week and it sort of reminded me that I have a copy of Mega Man Zero for GBA laying around that I never quite got to. I tried to play it on my DS, but found the control mapping to be painful to play for any extended period (B/A default vs the much more comfortable Y/B mapping of the DS). I hear the DS collection rerelease lets you remap the controls to be more naturally ergonomic.
Does the collection rerelease have any particular problems over the originals? Like, are the graphics upscaled properly and does it play well? It seems a lot easier to get over tracking down all the individual Zero games.