I don't like the front grill at all. It doesn't doesn't flow at all with the overall design/accents of the car. The rear, I love. I think that horrible looking silver grill with a blacked out grill that echoes the rear (lower) bumper fascia. I love the interior, too.
I Kinda like the green. Dunno why, I was never a fan of green unless was on a hot rod, but I am digging that.
My wife and I rented an SL550 when we went to LA. That car was a blast to drive. Felt like it was gliding, had a ton of power, and had all kinds of cool options on it. I can only imagine what the AMG version was like. It gave me a whole new opinion of the high end Mercedes sports cars.