What's wrong with Season 3? I thought it was pretty awesome, especially the Sona prison and the whole Panama ''tropical'' feel it has.

Season 4, the second part was just batshit insane tho :/

Season 1 is amazing, season 2 isn't bad.....then it just becomes crap.

the first 2 seasons were great, after that it became absolute crap.

I have all of the seasons and although 3 and 4 aren't near the first two in quality, I still enjoyed watching them. You kind of feel the need to watch them to see what happens with the characters.

Umm I just didn't really like the whole Mexican prison as much in season 3. Like it wasn't bad, I watched it on DVD (so like 2-3 episodes per sitting) and it was entertaining of course, but in terms of sheer quality (I hate to sound like a hipster) but the first season really was the best. 

And I never did end up watching the last half of season 4, but the first half or so didn't have me entertained that much, maybe its because I was caught up and watching it on TV instead of on DVD like I watched the first 3. 

Edit: And it was years ago I watched them so sorry I wish I could give more specifics as to why I didn't enjoy 3/4 as much as I did 1 and 2. 

first season was great. Second season was good. third season was boring. fourth season was crap.