After playing Super Mario Galaxy 1 on the Wii, I really, really enjoyed it. So when I saw that the 2nd one was coming to eShop, I bought it. And I think that was a huge mistake. Some people like sequels that give you much more of the same..but I don't. Especially not when it comes to a game such as this. The reference to Thwomp's Fortress from Super Mario 64, and Captain Toad's appearance were cool, but the gameplay overall just..somehow felt worse than Super Mario Galaxy 1.
However, I picked it up for $9.99 on the eShop, and I suppose I can't be too disappointed, as I didn't get it anywhere near the retail price. But it was the only Mario game to ever get a sequel on the same console, and I think it could've been so much better. I would much rather prefer a sequel to Super Mario Sunshine (or maybe even another soccer/baseball game) before Super Mario Galaxy 3.