I got the trillogy back when it first came out, but I've only finished the first two games so far, twice putting it down midway through the second case of T&T, then forgetting what's already happened and having to start the case over again. >_<

Out of the two, I'd say I preferred the first game purely because of Edgeworth, so I'm going to have to see if I can get ahold of the Investigations games sometime.