This thing sounds pretty good to me. I have never owned or known anyone personally who owned an original Univibe, so I cannot make any comparisons there.
One thing I would really like to have seen on this pedal, is a blend control. Hardly anyone ever uses the vibrato setting on Univibe type pedals. Why not replace the mini-toggle with a blend knob? Turning the blend all the way to the effected side would be the same as engaging the vibrato mode anyway.
This is the first vibe pedal I have owned, but it sounds MUCH better than any vibe or rotating speaker sim I have ever heard in a digital modeling pedal.
I like to put it in front of my EH Pulsar tremolo pedal running in stereo with a shallow saw-tooth wave, get the speed controls working off of each other, add a little tiny bit of grit from my trusty Soul Food overdrive, and I get the best rotating speaker simulation I have ever heard. Add in the Pitch Fork, and I get a fairly decent electric organ sound. (can you tell that I like Electro Harmonix?)
Even though the description does not state that it is true bypass, I have noticed no problems with the sound of the buffered bypass and I have a fairly overpopulated pedal board with a mix of (few) buffered and (mostly) true-bypass pedals. Raising the volume control past unity gain does introduce a good bit of line noise, but this seems to be the case with many EH pedals and can easily be dialed out.
Unfortunately, I can't really compare it to other pedals in it's category, (Univibe clone) but I can say that I like it and am very happy with my purchase, and the price just can't be beat.
Keep in mind that if you are looking for a standard chorus pedal, and/or are not familiar with the differences between a Univibe type pedal and a conventional chorus pedal, then this is probably not what you are looking for.
I noticed that the PC-board inside is marked Machine Gun with a little silhouette of a bullet, I wonder if they changed the name at some point during production?