Hmm, I liked the intro, it got a bit annoying, it grew on me, it annoyed me a bit, it sounded awesome (in that order). It sounds like more of a song than Womanizer (which just repeats its title a tad too many times), but didn't have the instant impact of a lot of Britney's songs. More listens will tell me how much I actually like it. Right now, I'll give it a...tentative 8.