Overall the unit does a great job of charging our car and is convenient. We have an ongoing issue where the unit stops charging and has to be reset at the mains on a regular basis to continue charging. This varies but ranges from once every couple of weeks to once every few days. It resolves the issue but is also frustrating. Chargemaster are aware of the issue but seem unmotivated to resolve as technically the unit still charges after having to intervene on a regular basis. Apparently the issue is down to the embedded mobile sim which sends telemetry back to Chargemaster - something that is not required by me (as the app is a waste of time) but will stop the unit charging if it can't "phone home". Customer service whilst acknowledging the issue keep telling me someone will call me back - despite chasing them every few days this never happens. I can't help but feel they are trying to sweep this issue under the rug.