I never got to play this game, though I really wish I had. I'm pretty sure it's a very long game in the vein of the Baldur's Gate series. When it first came out, I saw some quotes from the developers stating that the game had more text that an average dictionary. I actually like to read through my RPGs. I've heard nothing to suggest that the dialogue is anything but excellent.
I've been trying to play through BGII on my current rig in an on and off fashion to little avail. I didn't have any luck getting P:T up and running, either. The old Infinity Engine games (God bless Bioware for the little engine that could) seem to have difficulty running on newer computers (XP, I'm thinking). Do you guys have any tips for getting these to run smoothly? I'll be getting a new computer soon (X2 4800+, here I come!); I'm hoping that I might have better luck then.
If you find that you like the game - these 100+ hour games have a way of sinking their hooks into you - then you might also want to try the entirety of the Baldur's Gate series. For some shorter fare, take a look at the Icewind Dale series, Neverwinter Nights + Expansions (I've heard good things about Bioware's premium module downloads, too), KoTOR I & II, and Jade Empire. These all tend toward action more than the other Bioware/Black Isle games mentioned previously, and should weigh in at 20-80 hours (I think I listed them in order of descending length), depending on how many side quests you do. That's not to say, however, that their stories are lacking - they're just not as long.