The Product ---------------- The product construction on these things is excellent - all the bits are cast metal (aluminium?) and you can tell, once the screws are tightened, they're not going anywhere. All necessary tools are supplied (x2 alan keys and a small spanner) with the stand. You get vertical adjustment at the pole by sliding the "joint lock" (the bit that sits over the pole and provides a hole for the arm[s] to fit into) and each arm can be swivelled freely in the horizontal plane. The Vesa brackets (the bits that join the stand to the monitors) are adjustable as well - you can tilt the monitor forwards/backwards and rotate it clockwise/anti-clockwise.
Once you're done adjusting you can tighten everything up and the job is done. This involves a bit of trial and error + a few goes to get right; but it's easy enough.
The Gotchas ---------------- As several other reviews have pointed out - you need to understand what your total horizontal monitor width is. This product (on its own) won't cater for today's bigger monitors. My exact setup is detailed below if you're interested. The really good thing about this product is that it's extensible: you can buy individual arms that allow you to go to bigger monitors without having to purchase a whole new rig. There is a limit - i wouldn't string more than 3/4 arms together unless I had a super light monitor at the end of it. But even then, you could buy another pole (again, see below for my setup) and redistribute some of the load (the Allcam website have a complete range of bits)
One other thing to understand is that - if you buy the MDM06 only - you get two "joint locks" ... those bits that fit over the pole and have holes that you plug the arms into. The idea is that your central monitor goes on the middle joint lock (which has only one hole for a single arm or vesa bracket) and the left/right monitors both attach to the other one (it has two holes!). If your left/right monitors are NOT a matching pair and the mounting holes for the vesa bracket aren't aligned - you'll get some vertical height difference between the left/right monitors that you will not be able to adjust away because they are mounted on the same joint lock. (I overcame this with my setup [again, see below]).
Overall --------------- It's not perfect (what is) - but it is a) solid as a rock, b) extensible and c) cheaper than the competition You've either got to be pretty angry or pretty impressed to write a review of this length. Overall - I'm extremely pleased with it and would definitely recommend it.
My Setup ---------------- I've got 3 monitors: a 27 inch front-and-centre with two 22inch side monitors. Let me say - right off the bat: The out-of-the-box MDM06 will NOT handle these sizes of monitors because the total length of the supplied arms is not long enough.
First I tried with a single pole and just had the arm extensions...but beyond 3 arms between the pole and the monitor - you'll realise that it's not a safe setup - you get lots of wobble if your desk is knocked and I couldn't shake the feeling that i'd arrive at my desk each day to find the left/right monitors a little bit closer to the floor.
In the end I got the second pole and have two monitors on one, and a single on the other....this is a representation
where "=" is a long arm, "-" is a short arm and "|" is a pole. This arrangement has one monitor per joint lock - which means all three are able to have their vertical position independently adjusted (which I needed as none of my monitors are the same model).
This works really well - the monitors are rock solid on the poles/arms and the length of the two peripheral monitors is just enough to angle them inwards for a perfect setup (for me!) I've also bought a couple of spare arms because I expect to upgrade to larger peripheral monitors in the future and will probably re-jig to this:
which is pleasingly symmetrical and will allow me to keep the same angle on the left/right monitors even though they'll be wider.
P.S It might have been cheaper for me to buy three of the single mounts - i haven't worked it out because there's no point and i'm not overly bothered - but it would be worth checking if you're thinking of something similar.