I have used Serif software for years and its always been brilliant. Last year they released Affinity Photo for the Mac and it had rave reviews and won awards. Priced at £39.99 it was amazing value compared to the competition. (see below for full paid for Mac version) chosen by Apple as best Mac app of 2015https://affinity.serif.com/en-gb/photo
Many people (including me) wanted a Windows version and we were promised it was in the works.
Well now it has been released and its FREE while in beta and will most likely be a very good price once released