The FP5 is the best in terms of repairability. The device just opens up without any insane glue, just clips and screws, the parts are there and are reasonably priced. And it's manufactured with sustainable source material according to the company. The workers are treated well also according to them. The company directly sells the FP4 with the deGoogled /e/os which shows that they care about privacy. I could also see them selling this one with built in /e/os sometime in the future. It also does everything you expect from a phone reasonably well.

However, as a phone in that $750 price range, the features and polish are lacking. For some reason, the phone just feels sluggish to use. I have a Pixel 6 and compared to it the difference is night and day. The screen says that it's 90Hz but it feels like 25Hz when scrolling sometimes. So I recorded scrolling on a chromium browser on both the FP5 and the P6P. I think you can see the difference. Keep in mind that the videos are both 60Hz so I'm probably not inaccurate when I say 25Hz.

I think the phone is overall positive since it gets you from point A to point B and the philosophy behind it is great. I myself am gonna be regularly using it since the sluggishness is something I kinda gotten used to.

Edit: I should have mentioned this from the get-go. But I have installed /e/os which is in beta. This could contribute to the slowness so take my experience with a grain of salt.