I finished the game so i know it's limit...
Torment worth your time couse even it used infinite engine or Baldur's Gate clone (whatever people said), there are several element That make torment good...well, at least i played the whole week non-stop until it's finish. That several element are:
a/ story: Torment is akind of adventure-RPG, that's make Torment fun and enjoyable. The story is so deep and unique. And you will quick level up, not like BG.
b/ gameplay: it's much much better then BG. for example: you can run, you doesn't need to gather the whole party just to change map (like fallout), better AI, better quest reminder/jurnal...mmm, there are several flaw but Interplay has release beta patch for it.
c/ movie: torment offer you with planty movie and good one not like BG.
d/ great and unique weapons and spell (i meant it)
But there are other stufd that is flaw/not so good:
a/ There are several flaw such: slow down in some area, or bugs in several mini quest...but with beta patch that interplay released, i think it's fixed.
b/ as i said before, this game is unique...don't imagine it's same with any other RPG especially BG. for example: you can change your class IN the game betwean mage-warrior-thieves, There isn't any ARMOR for you...there are several, but it's for your NPC...there isn't any missile weapon, but there are one NPC who can used crossbow-Nodrom...
c/ Torment isn't "pure" RPG becouse the story is very very strong, which made torment to become like adventure RPG. (i don't know is this a good element or bad element, some people didn't like it...but i do!)
Nb: I finished the game last week so i know it's limit. If i have to compere it with BG, i like torment better becouse of better gameplay. And about comparison betwean fallout and torment, don't think about it...Torment and Fallout is far far different...for example: fallout is "pure" RPG meanwhile Torment is kind adventure RPG, and about post apocaliptic-MEN, there isn't any nuclear weapon in torment-how it's become post apocaliptic? (but you can found nuclear waste drum in alley of lingering-fallout easter egg?)
CONCLUSION:
TORMENT IS A GOOD GAME, IT'S GOOD BECOUSE OF SOME ELEMENT BUT MOST OF IT BECOUSE IT'S STORY-WHICH MAKE IT LIKE ADVENTURE RPG. TORMENT HAS BETTER GAMEPLAY WHICH MAKE IT BETTER THEN BG. AND LAST TORMENT ISN'T SAME A BIT WITH BG, BESIDE IT'S ENGINE...EVEN IF YOU LIKE BG, IT DOESN'T MEANT YOU WILL LIKE TORMENT.
I STILL I LIKE FALLOUT BECOUSE FALLOUT IS A "PURE" RPG.