I was really surprised when I got this, how heavy it is.  I knew it was all-metal, but still, it's built like a tank.  It is a classic, and you've heard this pedal used on many classic albums.  You can take the bottom off, and adjust the sweep on it really easy.  Just look up how to do it on Youtube.  It doesn't require any tools besides a screwdriver to take the bottom off.  You'll want to get an adapter if you don't already have one, because nine volt batteries get expensive fast and are bad for the environment.  They could have made the battery holder a little better.  It's hard to get the battery back out.  With my Mustang combo amp, this was the only pedal I needed, because it already emulated pretty much everything else in the amp's software.  Great combination, the two.  There are a couple other pedals I considered, The Bad Horsie sounds really good, too, with true bypass, but when I found out that if you took your foot off, it quit, that was a dealbreaker.  The Vox is really close, and Vox did invent the wah, but the crybaby just has a certain sound that gives it an edge, but it's a matter of taste.  Some people claim that it sucks the tone out of their guitar, but I can't tell any difference.  Robin Trower has a wooden block that he sticks in it to set it at just the right spot for 'Bridge Of Sighs'.  If it's good enough for Trower, it's certainly good enough for me!