I got a set or two, I came across one the other day that I think Sinnertwin gave me when I bought some other stuff off him. I'm not sure where the others are.
I didn't mind the core robots, I thought they had some reasonable modes and transformations. I liked the visual style of the combined form, with structure of the vehicles forming hands and feet, very reminiscent of the constructicons, and a style choice that is otherwise not revisited in combiners.

Otherwise, I really didn't like them, I thought they were very expensive for their play value, the spring loaded nature of the limbs meant they couldn't be posed at all and the few that I had exposure to were not very stable.

While the more recent combiners have been fairly repetitive in their transformation design, they are a much better executed toy line, as individual and combined toys.