Hi Ganna,
I haven't used version 2, but I did have version 1 for a while. The user interface used to be terrible; they have updated it in version 2, but I still think that it needs work...
Adobe Camera Raw (versions 5 and 6) use sharpening technology licenced from the team that produce Photokit Sharpener - so you might find that Camera Raw is all you need.
There is another favourable review that you might want to read here:
www.luminous-landscape.com/essays/photokit_sharpener_2.shtml. Bear in mind though that the Luminous Landscape website is run by Michael Reichmann - a very good friend of Jeff Schewe (one of the people behind Photokit Sharpener); so read the review knowing that they would be unlikely to say anything negative...
Personally, if I had the money to buy a sharpening application (or plug-in), I would buy
www.niksoftware.com/sharpenerpro. I think that the entire approach to sharpening is better in Nik Sharpener - and the U-Point technology in that application will (I think) do more for your images.
Don't take my word for it though. Both applications offer trial versions - you ought to try them both to see which one produces better results (and which one you prefer using).
Also - the best sharpening technique that I have ever seen is on this website:
http://www.bigano.com/index.php/en/consulting/40-davide-barranca/90-davide-barranca-notes-on-sharpening.htmlIt is a bit challenging - but you can do it without using any plug-ins, and the results (as you'll see) are amazing!
Perhaps you could post about what you decide to go for, when you have given the trial versions a try?
All best,
Lee.