I absolutely love this game system as it allows for such versatility that it puts many other to shame. My friends and I started with the original OVA allowing us to pursue game ideas we couldn't in other systems. While we also enjoyed BESM and it works well for many Anime genre stories, it has more confined rules as compared to OVA. The first game we ran using OVA was a Macross saga. The flexibility in the rules and adaptability of the system itself made for one of the best multi-session games our group ever played. OVA revised answered some ambiguous rules that we had to wing it in the first edition of OVA. the system is also very easy to learn and even new comers need not worry if they don't know everything about it as each section of character building explains what is what. All in all I think that OVA is the new BESM for anime style games but as it's not limited to that and easy to use allows for OVA to be a very proficient game system.