Do you feel it is worth the upgrade ?

Yes! It feels.. very polished. The new notifications and settings area are just awesome. Also the app drawer is pretty great. And the animations... smooth as butter!

This is not the case if you installed the beta via the beta tester program (and thus received the beta via OTA) and wait until P is released.

If you flashed the beta manually or want to downgrade, then yes, you need to wipe and flash.

You have to wipe the phone to upgrade to the release version? Might change my mind about installing the beta.

If you do OTA (over the air) updates, no, you don't need to ever wipe your device. At the end of the beta they'll just push the retail version and de-enroll your device.

This is my third beta (8 and 8.1) and I never wiped.

Still here! Definitely stay away from preview release on your main phone, but once Google slaps beta on a build stuff is pretty stable (have not tried in car Bluetooth yet -- knock on wood).

As a dev, days like these are the ones where I get my moneys worth buying into Googles hardware :)