I've set up SobiPro on a new site and it has been working great. I ran into some minor problems, and Radek spoke with me over skype to resolve issues. This level of expertise and support is so important in the extension development industry.
Great job with the extension, Radek! You rock!
I was impressed of the bat. Uploading images is simple. I love that I can do it with a simple FTP Client. No zipping up images like you have to do with RSGallery for mass uploads or anything like that. very easy and simple to use.
I would suggest to the wonderful developers to support categories/sub categories, though. For the site I'm building right now it was necessary to have this function, but I've figured out a way to get around it. Its a bit more clumsy, but it will work.
A++ Gallery here!