Via @Morgan_Hardwood on G+ comes a nice user perspective on the recent addition of wavelets in RawTherapee!
https://rawtherapeewavelets.wordpress.com/
This was written by Paul Matthijsse, and he’s graciously allowed us to re-publish the article here on pixls. I’ll be copyediting it shortly to get it up (I’ve got another new article coming in the next few days that I took way too long to get out… 
).