WooHoo! It arrived yesterday.
Initial impressions (also posted on DPR):
1. Very well built with a sturdy construction and quality connections and parts
2. Heavy, but has a very good balance on the K20D
3. Works without any vignetting on the DFA 100mm Macro and the Sigma 180mm Macro - the latter needs an additional 67-72mm step-up ring which I purchase on fleabay for ~£3
4. From my limited testing to date - exposure is spot on. For 1:1 macro work at f/16 I did need to dial in the provided +0.5 power on the dial
5. Slower recharge rate compared to me Metz 48 AF-1
6. Cable might be unwieldy for some, but fine for me
7. Although composed of two flash lights, they almost completely encircle the flash (semi-circular in design) giving a much better (IMHO) reflection that the Sigma or Metz macro flashes (small straight strip flashes) that produce distinct separate bars which (again IMHO) don't look as attractive in 1:1 macro
8. Having 5 settings for full, full-left full-right left and right flash are excellent and allow you to play with different shadow effects
9. Excellent service from SRS as always
Here are a couple of quick and dirty photo's I took this morning in the garden. K20D, ISO100, F/16, 1/180s, Sigma 180mm Macro:
Succulent plant (note the "ring" reflection in the water on the plant - the other light reflections are from the sun):
Succulent on Flickr - Photo Sharing!
A Springtail at 1:1
Orchesella villosa (a Springtail) on Flickr - Photo Sharing!
So far I'm happy and can't wait for spring :-)