I'm someone that was skeptical about the Clockology thing. I'd installed the app a few times, never really got my head around it, and deleted it again.
Tried again recently with the latest version and what a difference!
Before, there seemed to be too many compromises needed to use the Clockology faces, but now it is really well integrated. The app stays live all the time so it works almost like the Apple faces now.
The only things missing are Always On and complications. I thought I'd miss Always On, but not really as it happens. Because Clockology is now always live, it shows the watch face as fast as you can raise your wrist.
I was never one for complications so the lack of them is no big deal for me. To be fair Clockology is gradually getting some of its own and can show activity, weather, etc - although I don't use them personally.
Clockology also has a complication of its own that returns you to the app. If you end up on the stock Apple face, make sure it has the Clockology complication and you go back to your preferred face with one tap.
Finally, a lot of the people designing Clockology watch faces do an amazing job - great recreations of the originals.
Here's mine from earlier this morning - Patek Philippe face.