I bought this software after using Adobe Illustrator for about three years. Prior to switching to Illustrator, I had used Serif vector design products (Drawplus SE Pro and Drawplus X4) which offered very basic functionality in comparison.
I bought Affinity Design expecting a tradeoff, no monthly subscription fees, for reduced options.
I was expecting Affinity Designer to be an evolved version of DrawPlus X4, and after buying the software it quickly became apparent that this is not the case. I honestly feel that in several areas, Affinity Designer is actually BETTER that illustrator, the UI is well laid out and very user friendly and although there are differences, no anyone will experience in Illustrator will pick up Affinity Designer very quickly and without much effort.
This software is perfect for small agencies, and at the price of under two months Illustrator CC subs, it offers exceptional value for money.