Both casualties in my first base assault, I lost good troopers because I pushed them too far forward into what I thought was cleared territory, with not enough move to escape the Chrysalid packs, and not enough success from their support to stop them.
I don't look forward to trying to take one of those monsters alive.
On another note, survived my biggest UFO yet, with a B-lister team that I didn't think was going to manage it. Though I spammed the hell out of grenades on a room of two Sectoid Commanders to do it.