Reviews; IGN will score it 85 or higher, others much lower im afraid.
Sales; Should have a 100k ++ first week, since it's Wii only. Lifetime it should have a shot at 1 million.
Anyway it's a must buy for me, since im a Wii only owner, and i like FPS games. Everyone here who has a Wii and likes FPS games should buy it, supporting HVS for doing the best.. :)