Problems I have found so far after installing Q with the easy-installer:
- my newest contacts are lost (yet, they were synced to ecloud)
- still the annoying “echo in call with loudspeaker” problem. It is there since the nougat version. See Galaxy S7 echo during calls with speaker - #12 by Cricoo
- Mail accounts have no more an associated color. That was an handy feature.
- App lounge crashes sometimes. To clean its cache makes it run again.