I also enjoyed these a lot. Well the first one. I remember having to get a new copy because the CDROM died. Very enjoyable progression and the final battle I knew was coming but was still very hard!.
Now the second game I got also, but All i remember of it .. it was very buggy. I dont think I progressed that far because I got stuck in some underground location and the game get crashing. Sad.
Never played the Al Qadim one.