I beat it just a few days ago. Then I started the challenge mode and now I am on the 9 or 10th planet. (Then I got distracted by Ninja Blade, which is an awesome game BTW)
It was really fun. I won't say it is better than Going Commando or Up Your Arsenal. One thing I don't really enjoy is the minigame that you use your sixaxis controller to direct the electricity. But I love the robowing section. Flying is always fun and feels very natural using the sixaxis controller.
Also I am with Sharky on the graphics part. I am spoiled by other new games too.







