I got my Goji today, haven't played with him too much yet but to me, the sculpt looks really good, the paint is beautifully-coloured (there are a couple tiny spots on his toenails, eyes look fine to me though) and the poseablity is obviously better than any other Goji figure currently available. The breath accessory is really well done.
If I had to pick one thing to complain about (and I do, since this is the internet

) it would be the figure's hands. His hands are HUGE. And I don't know if it's just my figure, maybe someone else can confirm, but his right hand looks weird - the pinky finger is about the same size as the thumb. When I first unboxed him I thought he had two left hands attached.

Apart from the hands, I think it's a solid figure and I'm happy to have it. SAL shipping from HLJ only took six business days! The Japanese postal system never fails to impress me.
I'm not planning to grab Mechagodzilla, but I will be watching to see who else Bandai releases in this line, and will likely purchase a few more of these - it's great to have such highly poseable kaiju toys. Will definitely grab KG when he's released, and I hope to see G2000, MKG, and Biollante.