Easy to set up and simple to read. However, my main complaint is about how you access information. You need to press the select button to scroll a little triangle from area to area on the readout. But the triangle is quite small, and definitely too hard for an older person to see. Once you have the little triangle in the right place, you can then use the other buttons to access different information. For me, max/min temperature is of interest - and is relatively easy to access (press select until you are in the temp. area; press up/down arrows to select indoor or outdoor sensor; press max/min button to scroll through max, min and current temp. One long press to reset memory). But why is the barometer, rainfall and UV measurement all in one area? This means you can't see both at the same time, and need to do more scrolling to access either.
So in all, for me, it is pretty good - but I wish they had thought a little about which information should be visible constantly on the screen - and made the little 'select' triangle a lot bigger!