Not a toy for those looking for deep and involved transformations and the combiner vehicle mode works best for display than playability.
The weaponizer aspect on the other hand is where Cog is strongest. I prefer the weapons attached to Skytread than Sideswipe because the more holes for attachment the more bang for your buck from Cog and I got so carried away that I began adding more weapons from other series. I can only salivate at the prospect of combining this weaponizer with the upcoming weaponizers such as Six Gun and Brunt.