I own a collection of five Lell stompboxes: DD (overdrive/distortion), compressor, CZ (chorus/delay), brutalizer and noise gate
All of them were buried in the storage room several years ago
But I can rate DD pedal as decent sounding effect. It could compete with Boss DS-1 pedal. Its overdrive mode is especially attractive, provides warm and tasty overdrive tones when connected with a tube amp. Distortion mode is not remarkable, though not bad.
I used Lell compressor a lot when I was a beginner; it gives good sustain enhancement, but creates lots of nasty noise as well. After while I decided to put this pedal on the shelf due to this reason.
Lell CZ (digital delay) was frequently involved in my early guitar practice. This effect can generate some really freakin' psychedelic tones, and it could be useful for some sound experimenting. But I used it as reverb to get "bulky" sound from my early cheap solid state amp. I also considered this pedal pretty noisy, but not very irritating.
Brutalizer was a kinda disappointment for me. I tweaked its settings many times, but could not get any good tone out of it.
I also own Yerasov wah pedal CW-2. I did not try any other wah pedals yet, because I rarely need this effect, so it's difficult for me to rate this product. But I don't find it's amplitude range wide enough. This pedal is also pretty noisy