This film had some slight enjoyment to it but nothing to crazy. Considering the time in which it aired, the animation and budget was improved quite a bit over its TV series counterparts of each respective series. How ever I did not like how this film protrayed more of an emphasis on mazinger dominating most battles and Devilman characters were amostly delogated to supporting roles.
Personally I enjoy the Devilman verse more so then the classic Mazinger series and to see the Devilman villians treated like this was kind of off putting. All in all though the budget and animation was interesting and if you enjoy Mazinger and Devilman and you are just looking for an excuse to see both heroes in action teaming up with some interesting fight choergraphy, then you may enjoy this.