Yeah I agree with what u guys said about mp1 as a better toy. I've got both MP1 and MP10.
I bought MP1 two to three years before MP10 came out. It was my first ever masterpiece and it was what got me hooked. But to be honest, when I first opened the box up, I was a little disappointed with the aesthetics because I thought it looked better in photos. But after playing around with it, I began to like it more.
MP10 is different. I wasn't 100% sold on the aesthetics based on the online pictures, but opening up the box, I blew me away completely.
I've since contemplated selling MP1 a number of times, but I've decided to keep it simply because I was thinking of doing a Optimus prime collection. Need to hunt down a THS and a G1 and a few others.