At least there was an ending.
It was hurried and messy and it skipped a lot of stuff, but well at least there is an ending. So many anime's out there that don't have that.
The OVA itself was hurried, they skipped a lot of explanation. I think if they made short OVA series it would've been a lot better.
It's also too bad they didn't even show the ending properly like in the manga.
Guess I'm glad I read the manga, otherwise it would've been a disappointing ending.
If you only saw the anime I do recommend reading at least the last chapters of the manga so you might feel more satisfied about their ending. If you have the time you might read it as well from the beginning to end.