Behringer UV300 Ultra Vibrato

For the sound alone, this pedal comes highly recommended, as it simply sounds excellent. If you haven't already, go watch the comparison video with the coveted Boss VB-2 on YouTube, made by JHS Pedals; they sound identical, and even share the same bypass features selected by the Mode button, which are just as useful as they are fun.
Unfortunately, the plastic housing and overall cheap feeling choice of materials does not support the great sounds found in this unit (hence the very low price), which over time may or may not cause functionality issues.
Also, the Rate of the vibrato effect does not get as slow as I would've have liked, which is the only reason why I parted with it after a short while. If you don't need it to be super slow, and don't stomp it violently, this effect box can provide you sweet vibes.

This is my 45th pedal overall since 1989 but first Behringer 'compact'. I'm going to ignore the fact that these cost less than £25 and concentrate on sound, performance and features.

PROS:
It sounds excellent, really. Boss-level quality. The effect can be silky-subtle to moderately strong - no useless extreme modulation settings here, which is a welcome change, especially on a budget pedal.

Although, as if to make up for it, the 3-way switch sports an utterly useless 'bypass' setting. Probably because some other 3-knob pedals in the range actually need that switch and it must keep manufacturing costs down to use a common chassis.

Control knobs all feel reassuringly solid and smooth in travel with, I'd say, a little more resistance in feel than Boss ones - less chance of them being brushed out of position by a stray foot. The 'rise' control (an attack or pre-delay before the effect starts) takes some getting used to to hear it, but its certainly worth fiddling with for decent results.

No noise, output issues or noticeable signal loss whatsoever, although I'm using a reasonable quality '1-Spot' power supply so your results may vary. But certainly this is free of the sometimes problematic results I've had with the cheaper TC Electronic pedals which are meant to be upgraded versions of these.

I... um, I really like the 'Olive Drab' colour... goes well with all my other green pedals.

CONS:
The side-mounted power input is awkward and necessitates an L-connector on your power supply cable/daisy chain.

The battery access is a joke - you're supposed to poke open the hinge mechanism with a biro. I can't see that happening easily at a gig or lasting very long without damage. To be fair, it's probably less hassle than the four screws on the back of my Big Muff, plus I never use batteries anyway. But not very practical for regular use.

And finally, as has so often been pointed out about these models - the plastic housing appears to be made of some kind of spongy extra-flexible plastic. Does not immediately install confidence - would I gig with it? Well, I know a bunch of people that have done so for years and I've never heard any off them complain about breakages or any other issue for that matter.

SUMMING UP
When I was 18 I'd use batteries and chuck my pedals into a bag at the end of a practice or gig - this pedal would not have survived a month, let alone still be one my board 30 years later like some of my Boss pedals are. But then again, I'd have had no use for such a gorgeously subtle effect like this when I was 18 and playing Grindcore - these days I have a decent power supply, a pedalboard and more varied tastes.

I'm going to buy the Super Fuzz now, and possibly that pink HM-2 clone.

I have two Behringer pedals and just wish they weren't made from that plastic. They feel incredibly cheap (which they are). The sound from both is great. They are part of a set of 9 pedals I use for utilising the individual outs from a drum machine. I use the Ultra Vibrato with a mono synth and it's great. A feel of quality is often important to me as an artist, as it enhances the artistic process and experience, however the most important factor is the sound.
Cons - Unfortunately the jack connector is loose with a 1/8th to 1/4 inch jack I'm using to connect the external outs from the drum machine, and the cable very easily pops out if touched lightly. The same cable has no problem with the TC electronic pedals I'm running other drum sounds through.