My experience was OK, but it’s not as polished as PureOS is on the device. I prefer plasma mobile in regards to look and feel, but necessary things were somewhat glitchy.
For example the current version of plasma mobiles dialer does not hear any audio from the microphone. Also it has trouble remembering network settings sometimes. These are both known issues with bugs in their bug tracker but they have not seen much movement in the last few months. As such I’m switching back to PureOS just so I have more of the real functionality of the device back. I’m still hoping to land on plasma mobile in some form eventually