I loved the overall atmosphere of the mission, especially during the beginning and in Prometheus Station. Felt really eerie, especially with the VI watching your every step. The cameras panning towards you was a nice touch.
It was nice to be able to explore a planet in the Hammerhead. The thing is tons better than the Mako. My only knock against it is that it feels like it's made out of paper, especially on insanity. Those turrets scattered throughout the land rip right through it. The best way to fight in it is to just hang back and hold down the right trigger. Combat can get pretty tedious in it. Still though, I much prefer it over the Mako.
It's disappointing that there wasn't any new squad dialog, but I didn't get my hopes up for any. A mission like this just begs for some comments from Tali and Legion, though.
There is plenty of on-foot combat, mostly fighting geth. The last part of the DLC is great, and the final "boss fight" can get pretty hectic.
Overall, I loved it. The atmosphere is great, the story is good, there is plenty of combat, and there is finally some planet exploration that should satisfy those that missed it. Well worth the purchase.