I had Stridor back in the day, and I thought the robotic horse made a good companion for Fisto. In "Origin of the Sorceress", MAA stated that he created Stridor as "the perfect companion" for He-Man. Either MAA forgot about Battle Cat or he built Stridor to stop Cringer's whining. It was a good episode, but I thought that one comment was odd. It would have been better if, in a different episode, MAA (at king Randor's request) had decided to reward Fisto and Mekeneck's faithful service to the crown by presenting Fisto with Stridor and Mekaneck with a Road Ripper. Although He-Man is, of course, the greatest hero in the land, he isn't the only one worthy of recognition.
As for Stridor himself (itself?), I gave him a 10. The figure was well constructed and very nicely accomodates most action figures from the MOTU line.