This Prime is defiantly worth buying. Nicely design, and the scale is just right, at least, not as large as the MP1.

I like the transformation, you only need to read the instruction once and you would know how to transform. Unlike the MP starscream, until today, I still would not be able to transform it without reading the instruction.

The down side of this toy is that the arms are too long, but since it is adjustable, it is ok for me.