It's definitely not for everyone. I have more than a couple of issues to take up with those guys. For example, defenses don't adjust to the strong side of a formation, so offenses simply flipping formations can gain a fairly strong advantage.
On the flip side, there's no audibles so the defense can play a pretty simple guessing game of blitzing from varying sides and gain a lot of success from it.
Nonetheless, it's got me pretty hooked and I've put probably about 100 games in.