Front Mission 4 was one of the five or so games that I bought during my binge at the end of the summer, a couple weeks before my PS2 died.

I only got to play about 8 hours of it, but I liked what I played. I haven't played Front Mission 3, so I can't comment on it. I currently have a number of unfinished PS2 games that I can't play (like Gradius V, and Legaia 2), and it saddens me greatly.