I have been looking at the Worm, and I think it might be my next purchase. I also think that it might work well with my Good Vibes (Chorus/Vibrato) and Dual Expression Pedal. I have watched several demo videos on the WWWW, but I am waiting for a local store to have one in stock that I can actually demo myself.

Pros:
Analog
Multi-Effect (Wah/Phaser/Tremolo/Vibrato)
EXP Control

Cons:
Multi-Effect (Wah/Phaser/Tremolo/Vibrato)

Multi-Effect is listed as a Pro because packaging all the effects in one unit lowers the overall cost, but it is listed a a Con because a dedicated pedal for each effect might offer greater control for each specific effect.

As for modulated effects, I generally use them to the extent that they are barely discernible to color the sound. Usually, if I can make out the effect there is probably too much of it.

I finally found the time to write something up about the all-analog Worm. First I will discuss its operation without an expression controller. There are three rotary controls, from left to right: 1) 4-position selector Wah, Phase, Trem, Vibr, 2) Range knob, and 3) Speed knob. The first allows for selection of the desired effect, The second sets the maximum value of the Range sweep, and the third sets the oscillation Rate. Additionally, there is a mini toggle switch which allows for either Auto or Manual/EXP mode.

Auto mode creates an auto-wah, auto-phaser, etc. effect where the Range and modulation Rate of the effect are set with their respective knobs. The phaser, tremolo, and vibrato can be manipulated in various combinations and there are some very nice sweet spots. The same is true with the wah, which EHX refers to as neo-wah. While there are some good wah sounds, they are not throaty like a crying wah (although I used a Good Vibes in chorus mode with the Worm’s auto-wah into my Marshall’s OD channel, and was able to dial in an incredible sound).

Manual/EXP mode disconnects the Rate knob leaving no oscillation to the audio. Instead you are left only with the ability of sweeping the Range either manually (literally by hand), or with an expression pedal. This seems to work kind of OK in producing some type of modulation on the Wah setting, but seems odd in Phase, Trem, and Vibr modes. It might be more useful if the Rate could be instead controlled with the expression pedal.

I bought the Worm primarily for a wah, and the other effects were an add-on bonus. After almost thirty days of trying to learn to like it, I returned it to the place of purchase and instead bought the EHX Cock Fight which means that while I now have an incredible wah pedal, I am out the phaser and tremolo (my Good Vibes has a vibrato option, at the expense of chorus). I’ll probably get a Bad Stone and a Pulsar down the road. Also, I may purchase another Worm in the future. It’s not a bad pedal, it just didn’t meet my current needs.

As a side note, the Worm requires a +24 volt power supply (one comes with the unit).