My first shop fitted Avio didn’t read at all but Shai (Avio) quickly sorted that. After that it seemed to be wildly affected by temperature dropping out a fair bit or reading superman. Shai done a fresh install and it seems to have sorted it. The first batteries in that fresh install didn’t seem to last long, a sign I think was the meter dropping out into a cold wind. It still drops out in those conditions but the new unit seems to recalibrate to temperature quicker and I am getting none of the Superman readings. I was then out for a month due to circumstances beyond my control and expected dead batteries again but ( as it’s warmed up perhaps ?) I’ve been delightful surprised and feel it is matching my perceived effort. For the money paid for the Avio I am pretty happy and may get another one for my other bike.