The guide is very detailed. As other reviews have stated, the only useful tools are the included metal spudger and the non-included putty knife(I got a 1 1/8" but you could go larger or smaller, mostly just used the edge of it for prying apart enough to get the spudger in). I got this kit primarily so that I'd know I had the correct battery. The package is not OEM but it's the same PN, higher capacity, fits, and it works.
All in all the procedure was pretty easy, but I do similar stuff for a living. I looked at 4 steps, winged the rest and it turned out great. If you follow the guide and are careful then it should be hard to go wrong. I spent more time looking for somewhere to buy the battery than I did replacing it.
Also I thought I might have had an intermittent connector(which goes to the control board) but the contacts were just dirty. My iPod now works like a champ.