If its not about how much practice would i need to get it down. I've been playing for about a year.
Porbably a week or so to get it perfect, depending on your technique level.
The only truly difficult part is the intro if your hands are small, because the arpeggio Adam D. picks in the beginning is a big stretch. The per-chorus riff (Surrender! I give in...) is a bit tricky because of all the hammer-ons but not ridiculously so.