If you enjoyed the series, this is a must see.
Although the OVAs go to a great length to setup the series (and themselves are superior quality to the series itself), there is still so much left unsolved and unexplained.
Regardless, even though I was hoping for more, I was pleasently surprised by these features and certainly would recommend them to any fan of Science Fiction.
If you're reading this and you're just stumpled on whether to give this series a chance, I recomend reading my review of the Terra Formars Series. As I give a much more in depth review.