Ditto, if you follow the step by step instructions it's really not a difficult job at all. One word of caution, though; getting the crank shaft pulley off was dang near impossible for me. I even made one of Bart's tools out of flat bar stock and a couple of bolts, but ended up bending the carp out of it and the pulley didn't budge. Ended up having to place the breaker bar and socket on the nut, and then braced the breaker bar against the frame rail. Gave the ignition a quick bump (scary ) and that loosened everything up.
OH, I also ended up stripping out the hole in the engine block for the idler pulley, I think. It was that or the tensioner pulley. Either way, I guess the bolt was "welded" to the block due to the different metals, and I stripped the block just trying to back the bolt out. Had to have a more mechanically inclined friend come over to drill out the block, tap the new hole, and install a heli-coil. New bolt went in without issue, and I haven't had a problem at all.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless