Roadbuster is good for what I want on my shelf, a beefy, reasonably "Classic/G1" representation of the character. His transformation is intuitive and fun without being simplistic. I think part of what sucked the fun out of him for me was putting on over 30 different stickers. Hasbro, please, just stop it with the stickers already! Leave that bit of Transformers legacy in the past.
I like Sky-Byte a LOT more than I thought I would. He shell-forms quite a bit, but the transformation works well and is intuitive. I wish his head could look up just a tad bit higher. He must suffer from the same self-esteem/pathological shame issues as Classics Ironhide and Rathcet. It also helps Sky-Byte's case that I opened him up while watching Sharknado 2 with my partner. He did not appreciate Sky-Byte's commentary during the film, though.