I have the version two Nokia 8110 banana phone with KAIOS. First, web dev isn't good enough for me. I need crypto libraries on the device. Second,unless I've yet to discover how to turn it on, no predictive text input. Third, it ships with Google apps which, combined with the fact that you cannot uninstall apps on KaiOS makes the phone a novelty at best. More like a waste of €60 (none of these issues are obvious before making a purchase).

/Edit - battery lasted two weeks between charges.