I am currently subscribed and it is definitely a step up from other engines I have tried. The main feature is just that it seems to somewhat cut back the general blogspam and SEO fluff. It isn't perfect but whenever I do compare it to Google, Brave or Duck Duck Go it seems to be ahead, or in rare cases similar.
The ability to lower/block sites is also quite nice. I also have a few raised sites, but that is really a minor improvement compared to blocking crap like Quora and Pintrest.
That being said the small plan is a pretty small number of searches so I need to pay for the unlimited plan which is quite expensive. I currently think it is worth it but it is definitely borderline value, not a slam-dunk decision.
I also have concerns about them focusing on things I don't care about. Lots of AI features and a browser. I don't want any of that, just focus on search, there is still lots of room for improvement, even if they are currently leading the pack.