There's nothing especially wrong with the first OVA. It's a straightforward adaption of the "demon of the frozen castle" arc. There were some plot details i was disappointed were cut, but they weren't necessary to the story and i fully understand why they were left out. The story works just as well as it did in volume 4 of the manga.
The second OVA is where it falls apart. It combines original material with events from all over the manga, especially the last two volumes. With a lack of proper setup for the ending, it simply couldn't happen the same way it did in the manga. This is where the OVA's simplification started to work against it. Characters' motivations, never what they appear in a CLAMP title, were changed to the surface explanation. Because they were motivated by different things, they behaved differently for the major confrontation, with the result that the ending felt incomplete and, to me, illogical.
The animation, on the other hand, was excellent. I feel like this would have been best handled with ten OVAs of this length, one for each volume of the manga. That would have enabled them to show the full story, which i believe was the cause of the problems. If they had time to set up and foreshadow later events, the story told would have been more interesting as well as more complete. It would also make more sense – always a plus in my book.
As a companion piece to the manga, it's perfectly alright, although not what manga fans would want. But to watch it on its own, without the manga as a reference point, i doubt it would make much sense. It certainly doesn't tell a full story. I fully admit that i'm biased in favor of RG Veda, which is why on my own list i give it a 6, but really it's more of a 5.
