Agreed.
I actually found it fun, frustrating and boring. It's a bit odd really. Some parts were really enjoyable, and I found myself really getting in to it. Other parts were so easy it was actually boring and repetitive (and this is from a guy who is NOT a hardcore gamer!!), but then all of a sudden I'd come across this really difficult part that would just stop me completely.
I just finished the Autobot campaign last night... wasn't much of an "ending". The battle with Trypticon was a bit annoying because of the damn timer, and every time you die it went all the way back to the start of the friggin cut scene
The Decepticon campaign is a hell of a lot easier so far. I'm almost done.
All in all, it's still fun - just not something I'll play more than once!