Have been building my photography site's store using the Image Store plugin 2.2.2 and styling was going well.
Installing 3.0.0 and there are many problems:
1.) the page template seems to have changed and galleries are now picking up a template that includes widgets I use in the blog section of the site. This in turn knocks out all the styling changes I'd done and packaged into a custom plugin. The page template for galleries needs to be either selectable, or reverted back to whatever 2.2.2 was configured for.
2.) opening images in the store appear in either a browser window for just the image or the WordPress image page. What happened to the lightbox?? This is (in my opinion) is a massive step backward and one of the biggest reasons I immediately downgraded to 2.2.2
3.) generally, a fair amount of the CSS elements I'd been identifying with FireBug and styling as I needed them to be for my site, all seem to have been removed as most of the plugin packaged styles I'd created don't seem to apply anymore. The plugin out of the box needs to be styled and a responsible way to do this is outside of the plugin code itself to ensure that updates don't overwrite the style changes. Backward compatibility would be nice to have here or I'm looking like having to start all over again (assuming the above two points are resolved).
Don't get me wrong, this is a GREAT plugin and has enabled me to save a fair amount of money hosting my own site rather than paying for a templated product for the job. It's also a plugin I'd be very happy to pay for (with some of the above mentioned savings), but with an upgrade like this completely breaking all the hard work I'd done to integrate it into my sites style I'd now think twice before parting with any money.
Hope this all gets resolved, until then I'll have to stick with 2.2.2