I've never done a review before so I'm not too sure where to start. How about the beginning?
The start is reasonably easy, its only until you get to the first real beat does it get a little trickier. There is a snare+hihat-kick-hihat-double kick-snare+hihat, which catches me out on occasion. Just before the verse starts there is this ridiculously fast snare roll with kick, which is virtually impossible (might be best to save overdrive for those bits so you don't have to play them). Other than that the verse is relatively straight forward.
Its only until you come to the chorus where things seem to get very difficult. I say seem to because I personally found this section easier than it looked. This is also the best part of the song, especially if you nail it :)
Other than the above and the outro you will not find things *that* tricky.
I personally think this is the best song from Pantera available for download. And if you like their music I can highly recommend the whole album!