I'm on the fence with this one...
there is little to fault technically...
but as a point of interest, I see a lighting setup that seems to contradict itself.
What I mean is this, Usually when one goes high key on the background, one expects softer, lower contrast lighting on the subject... In this case I see dramatic light on the subject with strong shadows going right to black, and it almost cries out for a low key background...

I also use mine for macro abstract shots it does focus remarkably close, and for dreamy landscapes esp at night where the boke adds some interest to the nightlights.

portraits.
the main things to remember are :

A: hard light works better than softlight....

B: compose so the area you need sharpest is dead center, it is sharper in the center and softer towards the edges, so you do your real composing by cropping after shooting, with people portraits you usually want the eyes sharp..

C: it is manual only, wider aperture are softer, stop it down and it gets progressively sharper...

D: you want a lenshood and nd filters to go with it.

I use mine with the af 1.7 teleconverter and it auto focuses...

Boke is unique and creates almost 3d orbs of light off specular highlights...

No need for ruffled feathers, have you checked the link you posted to see if it still works?
I click on it I get the main site, no lens. which is weird because the first time i clicked there was a lens...

what a weird websit... I clicked that link once and saw a pentax 85 soft, went back and got locked into a main page with no way to go back to the pentax...

I noticed that out of 29 posts most are of items for sale... are you affiliated with that company you linked to?
Just curious....

I got one and I love it!

being the cheap SOB I am, I made my own.
I bought a couple cheap (kaiser perhaps, not about to go look, I'm editing video in another room right now) hotshoe adaptors with pc connectors and some phono plugs from an electronics store and soldered my own.

they cost me about $10.00 each and have a tripod socket..

My experience with the skyports has been nothing but happiness.
with my elinchrom strobes, my 360ftz flashes and my vivitar flashes... all good..
however I usually shoot at 1/160 sec and slower never really tried 1/180 or faster...
I still shoot with k10's and a ds2...

Answer:
It's already digital, so when the people looking at the image decide to call it "Art"

I use elinchrom skyports, love 'em.
there was one member here that just hated 'em due to a banding issue...
I came accross an article recently about the odd camera having a "slow" or outside spec shutter defect, being hard to spot untill you start getting a dark band accross your images at max sutter synch speed, and it made me wonder about the other fella here that was having difficulties with elinchrom slaves... but I digress....

chemical handwarmers taped or rubberbanded to the battery compartments do help in extreme cold BTW...