For all of you complaining about the game being "the same" each time, what the hell do you want out of them? They are limited by the GBA's cartridge size and lack of buttons. While they try to add all the features of the latest console release there is only so much that can be done due to the GBA's limitations.
As for my take, I enjoyed THPS2 for GBA and finished it but I haven't finished any of the subsequent offerings. THUG1 was pretty good at first, but it got to the point where it was a bit too difficult to up stats, and the goals just were not articulated well enough. That is they'd give you a goal and it'd be impossible to figure out just what was neccessary to complete it. Depending upon file size and fun factor maybe this will displace RCR as my quick play game on my cart.