I must agree with the other reviewer. I picked mine up for £60 in my local Toys'r'Us and I'm very glad I only paid £60 for him.
As with the other Masterpiece figures, he's very detailed. The transformation from alt mode to robot is almost identical to the old Grimlock toy we all grew up with. He's chunky, imposing, and yet oddly shorter than my Masterpiece Optimus Prime! The face is just right, and even comes with a golden crown for him to wear. After all "Me Grimlock no bozo, me King!"
My biggest issue with him is build quality. The moment I took him out the box you could hear the plastic creaking, see the joints flopping loosely. Very, very badly put together compared to MP Optimus. I don't think he'd survive many transformations or anything but the most casual play. I've put him away in the display cabinet instead, to keep my MP Prime company.
If you can get it cheap, he's recommended, but definitely not at full price, he's just too cheaply assembled.