I've only had time to appreciate this figure in train mode, but WOW it's really really nice - very glad I picked these ones over the Moon Studios, they are the first set of TFs that might actually end up displayed in alt mode! The inclusion of the track is a really nice feature.
The heft is very real - I've seen some complaining about the size, but the feel is miles beyond that of a standard TF figure (although this is my first MP figure so I don't have anything to compare to!)

Very keen to fiddle with it more tomorrow.