ADJ COB Cannon Wash

In general I think this is a pretty good fixture for the money. However there are things to be aware of in making your decision to buy.
Bear in mind when reading this review that I come from a threatrical background, not an entertainment one - I intend to use this for theatre lighting.

Pros:
Inclusion of an amber LED makes for much better colour rendition options than you get from an RGB fixture.
The use of PowerCon connectors for power and both 3 and 5 pin XLRs for DMX makes for reliable connections and lots of flexibility. I much prefer the idea of PowerCon to IEC.
The fixture seems robustly built, with a very solid skeleton right up to the nose that makes it feel much more likely to survive knocks than a standard parcan body.
Light output is quite consistent across the width of the beam, although the defined edge you get was a surprise - it reminds me of what you get at the edge of a flood - which in hindsight probably shouldn't have surprised me!
I am pleased to see that the overall hue is currently pink when all channels are full on. Apparently red LEDs age faster (and thus dim faster) than the others so this initial red bias should result in a longer life.

Cons (in order of decreasing disappointment):
The tilt lock is awful - really, really hopeless. Attempting to 'lock' the fixture just reduces how easily it moves. If a cable gets pulled then it WILL tilt. ADJ really need to improve this.
There is some colour shadowing when used in close proximity, made much more prominent by use of the lenses. This makes for very noticeable and ugly colour fringing at the edge of the beam. However this can be reduced with a bit of diffusion gel in front of the lens, although this is a trade off because it will reduce the light output a bit.
The dimming is very slightly 'steppy' for the last few DMX values at the very lowest end, mostly caused by the green channel. This might be noticeable in a theatrical environment, where dims over 3 or more seconds are the norm. However I have seen much worse; it is probably just about acceptable and may be unnoticeable if it is dimmed alongside incandescent fixtures. I think the audience are also a bit less sensitive to it than us techies.
The acrylic lenses are very thin and both of mine have arrived cracked; they are effectively loose in the box, which is a slightly daft packaging decision by ADJ. I am asking for them to be replaced but clearly these are fragile and will need to be stored carefully.
This fixture is fan cooled, so it isn't silent. However it is (currently) very quiet and is thermostatically controlled, so the fan starts only when the light is dimmed up and its speed is proportional to the light output level. Only time will tell if it will get noisy as the bearings age.
Not suprisingly, the wide angle makes the fixture feel just a little less powerful than the numbers might suggest. 25 degree fixtures will of course seem brighter, so bear that in mind - but science predicts this behaviour!

In the box:
Included in the box for the European version is a power cord with what looks like a Schuko plug, which is no good in the UK. Thomann thought to include an extra cable but it is an IEC lead; despite the description mentioning IEC this actually uses PowerCon.
I am currently in discussion with customer service about how we resolve this. Whilst I could cut the Schuko off the cable in the box, this might arguably affect the warranty, so I don't want to risk it.
Also included is a Neutrik type B PowerCon out connector (the grey one, an NAC3 FCB) which is a nice touch from ADJ; you can use this to make your own daisy chain power cable.
For those who might read it, the manual seems pretty good. It looks like it explains every setting well enough.

In conclusion:
Overall I'm pretty happy; this should be useful - as long as I get the right diffusion gel to work round the colour fringing with the lenses.
I will use it for back lighting and wash lighting onstage, where the wide beam angle is a benefit. I will also try it as a frontlight boost to add colour into a wash produced using incandescent fixtures, but I'll have to see if the dimming and fan are a problem. 40 degrees will be too wide for front lighting in many venues, but not for some of those I light.