I brought a chatpad once but found it quite flimsy and awkward to press such small buttons. Never got to test it properly on FFXIV though, but in the end I ended up getting dual wired/wireless keyboard and it's generally so much nicer to type with for just about anything on the PS. Probably won't need a mouse though unless it's something you intend to use often, otherwise the Virtual Mouse Mode in-game (using controller) is enough for the odd thing or two.