For me it feels replayable in a way that you can experiemnt with builds, try new party members, try doing battles in a different way etc. That aspect of it is very, very rich. The linear map though, felt very constrained to me. Especially the Act 3, where I hoped once I reach Baldur's Gate things would open up, I would make my hub in the city and go out exploring (much like previous BG games). Instead you end up cooped up inside until you end the game. Dunno, I enjoyed playing it - just don't feel like playing it again. BG2 I replayed about ten times.