It was great, the Rhedosaurus is amazing, it really seems real, there's quite a lot of interactions between him and the people, and it's very well done.
I also was pleasantly surprised to see Lee Van Cleef on it!

Very generic giant monster movie. Quite boring for most of the running time too, although the great special effects from Harryhausen go a little way towards redeeming it.

Ray Harryhausen's first solo effort is not his best but will still please his fans.