I've bought this pedal because two main features: its small form factor and the flexible choice of functions.
Wah and Volume pedals are well known for their dimensions and their difficult integration with full pedalboards; this HoTone little gem facilitates its integration due to a cleaver design. The materials are rock solid and the feeling with the pedal is good. After a quick period of learning, even the player used to have a regular sized pedal under his feet can easily pull great sounds out of this effect.
Thus, what appears to be a con at a first glance, quickly becomes an opportunity and you can leave the wah in place in your permanent setup in your living room.
What has been the most appealing feature for me is the possibility to select different roles of this pedal: besides the wah effect, with the actuation of a linear side switch, one can set the pedal to be an effective volume unit, also selecting the volume range by means of a potentiometer, or use it as an expression pedal in association with a stereo cable. I do not used the Soul Press as an expression pedal yet but the volume function is smooth and very effective.
I never considered buying a wah pedal before because it doesn't meet my musical style but this product is usable even when not used as a wah: volume is far more useful to me!
At the end, my overall opinion of this swiss knife pedal, mainly considering the quality of its frequency sweep range as a Wah and taking into account the price, is that it is worth having one unit of this in your pedalboard!