First of all, as JEN as well as Thomas Organ are mentioned in the description:
As far as I know the history and even if it seems to be desribed and written wrong in Wikipedia, Thomas Organ did not invent the Wah, but Vox. (But this would be a longer story...).
After my first testing of this plugin I therefore really was very pleased, that this plugin really simulates the tone of a real Vox/JEN wah and not a Thomas Organ design based Dunlop, which I never liked.
The very first time, a Wah tone really made me grin all over my face, was, when I got my first JEN white Fasel Wah. This was this specia, uniquel Cream, Hendrix, Trower, .. tone, I always had been looking for and never got out of any other Wah pedal, especially not out of one based on the Thomas Organ design.
Therefore it is great for me, that this plugin sounds very authentically, just like my own real JEN.
So far, so good, but:
The GUI looks wrong, typical for a JEN is the yellowish-white border around the bottom plate, while the GUI seems to show just an ordinary Dunlop.
Even if this plugin is freeware, a wah pedal simulation plugin makes little sense to me, if it has no on/off swich and even more, if it has not option to control the wah sweep with a midi-expression-pedal while playing. What sense makes especially a wah plugin, which you only can use as a fixed wah or as a post-editing effect, which only can be adjusted manually? Especially, if the sound itself is excellent.
This plugin would be the best sounding wah plugin, I have heard up to now, but without a pedal control option it is - at least for me - hardly usable. Unfortunately. How shall I use and control it, while playing, without a third hand?
Maybe also implementing an additional auto wah option could be a good idea, not really authentically, but if digital simulations can even be better or more flexible than the real thing, this might not be completely wrong, I think.
Also nice would be an option to be able to select between some different original Fasel inductor coils, a white and red would be a good choice, or if some customizing anyway happens, also alternatively a Halo coil.
Would be nice, if this plugin still could be upgraded with these features, as the tone itself really is very good. I would not mind to pay for an upgraded future version with these options. With them implemented, this immediately would be my favorite wah plugin. As it is, I unfortunately have hardly any use for it.
At the moment it is easier for me to plug my own JEN in front of my audio interface instead. (I still have kept my old Stealth MIDI pedal, as I was hoping for a really good sounding wah plugin like this one somewhen, but unfortunately I still cannot use it, due to the missing MIDI control option. What a pity!).
I have a few midi-expression-pedal-controllable wahs (Strange enough for me, that most wah plugins are not), but they unfortunately all do not really sound like a Vox/JEN does.
This one sounds, as a Vox/JEN wah should, but unfortunately is not pedal controllable, which is hard for me to understand. Is like a guitar without strings or a tube amp without tubes for me. May look nice, but does not really work, as it should.
For the excellent, authentic tone I would have given five stars. But at the moment one star is deducted again, because of the missing on/off switch and most of all the missing MIDI expression pedal control option.