Product review (5 stars): Worked great
Worked great for our Whirlpool dryer.  The original equipment had a slider instead of a pulley for the belt tensioner, so this should make the new belt last a lot longer.  I tinker with a lot of stuff, but never dug into a dryer before, so I wasn't too excited about it.  As it turns out, it was pretty easy to replace, and it took me about a half hour (including looking for the right tools).