I always liked them. They are really the only Super Deformed TF's i ever liked. I only have a G1 Megatron and i rather like it. I regret not getting a Soundwave .
But they kinda reminded me of M.U.S.C.L.E figures from way back in the day, of which i was BONKERS for when i was a kid.
RH's isn't incredibly collectable for me but i like the particular super deformed aesthetics of the line more so than other lines of that ilk.
I think they're kinda neat really. I was hoping for the Skullcruncher one with Grax riding him to be released but the line got cancelled.