I like very much how the pedal looks and I prefer this sound over any other wahs.
It isn't easy to operate sitting down, especially to switch on/off which demands a bit of force. Don't blame me for playing while sitting, I'm an old guy with back aches. Somehow, it has a short rack gear and it is easier to darken the sound than make it brighter. When you press on toe highs are not thrilling, on the other hand, pressing on heel you've got more bass but also some kind of feedback which prolong the sound, kind of unique sound.
The wah adds a bit of noise in signal chain. The level with pedal off is the same with pedal on and pressed toe.
The construction is very sturdy, it is built like a tank. The pedal stays in place at any height you leave it, it doesn't slip away when you remove the foot.