"Knowledge base" have always been on my to-do list but never really found the time to do it right. This time, after testing the free version I was convinced that this will be the chosen one. For not a fortune we get a product that works like charm. Fast UI, customization options, and most important for me is the logic behind. Easy to understand and use, no fancy things, good integration with Astra and Elementor (in my case). Still some minor things to polish, but I'm sure the team behind will continue to improve and support the product.
Good luck with sales!