I have completed Jagged Alliance 2 four times so far, and will do it again.
I can only recommend you get this if you have never played the JA series.
Be warned though, do NOT expect an easy game :).
I personally own 2 copies of JA1, 1 copy of JA - Deadly Alliance, and 2 of JA2 (normal and gold version), and i wont rule out i might grab this one too, just for support :)