I would say wonderful in terms of capabilities and concept, just OK in terms of UI but highly effective. I guess more then OK in the sense pretty much everything is there and just works. Wish they had an android app. The things I like about it are:

• You can have pretty large notes collections and still use and navigate. At least for me though it seems to be limited to 3000 or so notes in a single notebook for speed reasons. That is way higher than I think I could sanely navigate in a normal app like Joplin though because it is a wiki and can be hierarchical too.

• I like that it stores as simple files in the file system. Nice format for fairly large notes too. So I can just manipulate stuff there if needed and process stuff with standard Linux commands or with Python. Really helpful when importing stuff for example, or reformatting something.