Firstly, I have no doubt that the PC version is the system of choice for this game. It can get busy and I wish the PS3 had the option to zoom out.
That being said, the PS3 version is still very, very good.
I'd read that the graphics were poor and the interface was a mess. I personally feel the graphics are fine. Not the best and not as monstrous as people had led me to believe. The interface (initially) took took a little getting used to. After an hour of so (and considering the complexity of Dragon Age) I was navigating around the menus with ease.
As for the game itself, it's a nice mix of many 'old school' RPG's that makes anyone with a history of this type of game feel at home. I will confess that it doesn't push the bar massively higher, but it is the most fun I've had on my PS3 for a long, long time.
I'm still on my first play through and I'm looking forward to starting my second. Not once have I been bored or wished it would finish.
I will point out that there is a lot of reading/dialogue. Some people will tire of the background story relating to the next quest chain. Because it's so well acted and the decisions you make have such an impact on what happens next, it feels real.
This is not MW2, GOW3 or any other action based game. It's a big RPG with a big heart. It will keep you going for many, many weeks. I have thoroughly enjoyed playing Dragon Age and I'm glad I didn't listen to the haters.