Ya, THE MYSTERIANS is a bit slow...but it has the casts of GOJIRA and RODAN combined. BK, have you listened to the commentary?
I did not pick up the DVD, but I will be picking up the others in this series of releases ATTACK OF THE MUSHROOM PEOPLE, YOG MONSTER FROM SPACE, DAGORA SPACE MONSTER, and I think there is another one...oh yes VARAN THE UNBELIEVABLE.