Been using this for months and never hear anyone talk about it. Faster updates than from F-Droid is nice.
As others said, it takes a while to get all your apps set up, but you get updates much sooner. I have about 12 apps so far that I update through Obtainium.
I’ve heard only good things about it, but haven’t tried it myself. Mostly due to laziness finding the sources of my f-droid apps. How quickly do you usually see update notifications after a new release drops OP?
The F-Droid page for any app has a Links section under the app description. Expand that, and the Source Code link is usually the GitHub (or whatever) link you want for the app.
As for update notifications, you set the “Update Checking Interval” in the Obtainium settings (default is every 6 hours). So whenever a new APK gets added to an app’s GitHub, Obtainium will notify you of it the next time it scans for updates.