OpenCanvas 5.5 is a very light-weight painting application.
What I think, in comparison to Photoshop, is, that OpenCanvas is fast and isn't overloaded with things you don't need for painting/drawing. Since Photoshop is an all-in-one tool, OpenCanvas concentrates on illustration and digital-painting.
Everything you need is (in my opinion) in the right place and surely improves my workflow. Worst part was learning new shortcuts but with a little practice you will notice, that it's comprehensible and some are identical to other design-applications. The event-feature is a nice tool just to see, how your painting process was.
I personaly recommend a wacom-tablet.
+ not overloaded with features
+ perspective tool
+ well arranged panels
+ shortcuts are easy to master
+ event-feature to 'record' your painting process
+ a really good blur tool
+ FREE UPDATE TO OpenCanvas 6
+ the mirror tool is integrated to the hand tool (when you hold space)
- double pressing a tool-shortcut will change the tool (I didn't found a solution yet, but it's a little pain in the ♥♥♥)
- no animated zoom
- I really miss a feature for straight lines like in PS (shift+draw or shift+click)
- no network-drawing like the first version
All in all, OpenCanvas is a pretty application for illustrators who are overstrained with Photoshop and its features.
For 45,99€ / 37,00€ in SummerSale you can't do anything wrong when you're looking for a light and easy drawing-app with a bunch of extras.
I don't know how much it will cost to buy version 6 alone but, if you buy the steam version you will get a free upload from v5.5 to v6.