I still think that they knocked it out of the park with that particular lambo mold and its various incarnations. It is full of proper robot chonk and is insanely satisfying to transform.
The original was a great ambassador for Siege.
At the time when all we'd seen of it was a few pieces from the first wave or so, it was easy to shrug off the underwhelmingly "Cybertronian" designs, partly because of the "I already have a Sideswipe" of it all. But actually getting it in hand, and finding out it's this very playable, nicely engineered design that made for a great toy and character representation, was a surprise. Definitely had me keeping a more open mind for the rest of the line.
It helps that he's one of the less Stege-y paint jobs, and that he weirdly looks well proportioned despite the shoulders basically being attached outside the full car width. For others they'd later go with faux parts for robot mode, but this guy made it look like the real thing worked somehow.
As overused as it is, I still want more of it. Specifically the Earth mode retool. In various colors (is there a pink Sideswipe lambro, or a green one? I guess the SG Sideswipe is kinda green), as well as an Earth mode take on the black G2 one. Although I never got around to buying third party spoilers as the redecos kept stacking up, and now I probably need like a dozen.