I've been using You.com for around 4 months. I tested the Pro version briefly, but reverted to the Free one since I discovered a more cost-effective tool with improved UI and UX. It's quite good, particularly the Chrome Extension, which proves to be very useful.
AI-Based Search engine which is good and the thing I like the most they listen to feedback there community.
An integration of YouCode which help you generate code [which has a couple of bugs for now but it's better than starting from scratch.]