I've got UBports on my N5 and I've been using it as a daily driver now for over a week. I'm very pleased with how things are going but there are clearly some issues still to be worked out. My use case is very easy... Phone, TXT, Browser, email, contacts, calendar, camera, doc viewer, calc and Hotspot. Nice to have are notes, podbird, uNav, uAdBlock and a couple games for the kids.
The only thing not working consistently is mobile data on ATT network. Once the phones manages to establish a mobile data connection it works great, but as soon as the phone stops using data, the connection silently drops. I have to toggle Cellular data on/off a bunch of times to get it working again. I'm working now to find a workaround, like setting up ping in Terminal, using uNav or getting a VPN tunnel established. Anything to keep data flowing so the connection doesn't drop. Also, wifi glitches up and doesn't activate... like turning flight mode on/off to fix cell connection.
Notifications working with Dekko2 and txt messages is great to finally have.
All in all...I real winner in my book. I couldn't be happier... just ask my family. Now its time to move my M10 FHD over to UBports.