Great value for money, and a space saver. Seems to be able to take some pressure even though it is plastic. Recommended, but...have in mind it is not as smooth and gradually as you may like a exp/volume pedal to be, it is....e.g.0-20 to 70-100, probably could if you're fine-tuned in your foot.
Yet, great value!
Have not tried in a wah use, don't like wah´s, but it is probably great for that.