Ugly but interesting

The igLoo series follows Zeon's 603rd Technical Regiment and its testing of diverse experimental machines throughout the One Year War.
Between propaganda, painful decisions, and broken men, this is one bleak series to watch.
Nevertheless, I found it very interesting, be it on the fluff aspect where you see the inner workings of Zeon's technical and political machine, or the technical one, with original and interesting mobile weapons to study.
The only and obvious downside to this series is obviously its dated CGI. But if you're willing to go past that, it's an ova series I recommend wholeheartedly.