I was able to power through nearly all of this season during FiOS' free On Demand weekend around Memorial Day and watched the rest via HBO Go. I was a little disappointed with Season 2, but Season 3 picked up the slack. It doesn't hurt the third book is more entertaining than the second, but there was finally a bit more action and bloodshed.
I like the casting of Tyrion and Tywin especially.
The real question is whether Martin will finish the series before the show catches up.