We were just talking about this on one of the forum threads. I had heard of this film but had never actually watched it until recently. Man, it is so bad it's awesome. The film has fallen into public domain, is available in those '20 Hours' of Sci-Fi compilations and you can even watch it online on Google video.
On a side note, Rog, have you ever seen 'The Mutations', sometimes called 'The Freakmaker'? I think it may make a fine Halloween induction. It stars Donald Pleasence as a mad scientist and Dr. Who's Tom Baker as a deformed psychopath. Not to mention a bunch of authentic human oddities.
Trailer:
http://www.youtube.com/watch?v=6Wz5SKcPeSo
The trailer, in classic exploitation/grindhouse style, gives away everything. Ample shots of the shitty monster, reveals all the shocking moments and even hints at the ending.