I'm personally not feeling the song (yet). Chorus is a somewhat annoying, specially the way she says LAWWVEE!, but it has shoe-tapping factor. There's something weirdly muted about the vocals and that key raise in the end is hilarious.
I loved the verses and the bridge a lot, the guitars and the end with It was a perfect illusion! Somewhere in all the confusion! being repeated over and over.
It sounds like Gaga produced most of it.