Basically these machines have only just become available here in the South African market. Whilst they could be specially ordered previously the local agents hadn't made them available as an off the shelf type item. The agents have finally come to their senses and are making an initial batch available at very good introductory prices for the first customers.
Considering the machine is still very expensive here (approx $580 at the special price) many of the local detailers were reluctant to buy without 1st having a sample they could test. This is the agent's demo machine that they have loaned me for the weekend to show some of the local guys and get some feedback from them. Whilst I know this machine has been available for sometime overseas, I decided to post this anyways because it may come in usefull for someone new along the way, much as many of your posts are usefull to me.
Lets start off with some pics, excuse the quality they are from my cell phone. I didn't have the batteries for my digital camera charged and there were a few impatient detailers waiting for pics on the local forums
The box it came in was alot bigger than I expected.
The contents all unpacked & Flex was kind enough to include both the bag as well as 3 of their pads for sampling.
The machine.
Machine and bag. The bag is really a decent size, one could almost fit all your essential detailing items inside. Quality is top notch and it is nicely padded, it will also double as a cooler bag of sorts with plenty of packing space inside
The included pads. We have a soft cut pad (white), meduim cut pad (blue) and a wool pad.
Included with the machine is a side handle.
Side handle attached to the machine with and without the extra cover.

Interestingly the extra cover is actually a godsend in some ways. When you put the machine down on the ground it rests on this plastic cover and not the top of the machine. Handy if you pedantic like me about looking after your tools
The local machines also come fitted with the updated 5.5" backing plate with additional foam.
Whilst on the subject of the backing plate there have been recent reports of the backing plate melting because of it touching the metal housing above when using excess pressure that is directed off center to the pad. Some guys found the bolt that holds the backing plate to the machine was loose and this caused excess play in the backing plate. Needless to say I checked this one when it arrived and it was loose, I tightened it up with an allen key and everything was perfect, no play whatsoever in the backing plate. I suggest all of you buying one of these machines check this bolt when you recieve it
Ok, on to the machines correction capabilitys. I didn't have that much time this afternoon to play with the machine but I did manage to give it a quick run on a small section of my wife's cars bonnet. The car is white so it is a bit difficult to see but anyways, I think the cell pics came out pretty well.
Here we have the swirled section of the bonnet.
I gave it a quick single pass with some Menzerna IP (85RD3.02) on the supplied white pad. Polish breakdown took about 8 quick passes or so before the polish flashed and turned clear indicating it was done. Here are some quick after pics.

I tried to capture the rest of the bonnet that hadn't been done to compare.
The IP finshed down really nicely however another pass with some FA on the white pad would just give it that little bit extra!
Overall after this quick introduction to the Flex 3401 I am extremely impressed. A couple of points that stick out in my mind from the initial session :
Ergonomics : The machine is extremely well balanced and you can comfortably operate it with one hand if need be. The trigger and speed adjustment wheel are perfectly located and easy to use while working, the lock button also makes it easy to switch hand positions whilst working. The trigger is also a speed control so varying the pressure on the trigger will result in the machine slowing down or speeding up accordingly.
Weight : The machine is really light compared even to a G220 belonging to a fellow detailer I know. It could however be decieving because of the machines good weight balance and ergonomic layout.
Speed settings : I found a speed setting of 2 good to start working the polish, winding it up to 5 or 6 and then back down to 3 to finish worked well. Speed 4 seemed to be the best for me with the supplied pads and IP polish.
Noise : At speed 6 the machine is quite noisy (gearbox noise), not deafening but earplugs could prove handy if like getting your head down close the paint to see whats happening as you working the polish.
Power : What can I say, at speed 3 I tried putting about as much pressure as I could over the pad without denting the bonnet and it didn't so much as flinch or change a note. This machine has decent power and I can now see why it can burn through clear coat if need be
Tomorrow we have the 1st local Meguiars Detail Day where we will be comparing the Flex 3401, Meguiars G220, Makita BO6040 and a Makita rotary all on the same panel, should be interesting to see the results. Sunday will see me and Rustbucket using the Flex to polish my brothers Black VW Golf IV so it will be the true test of what the Flex is capable of !