“Quite a pain to use. While CircuitPython is supported there's no Mass Storage support so files have to be copied over the REPL, which I couldn't get to work. With Arduino and the Tasmota firmware it had real difficulty connecting to Wi-Fi, even when 2 feet away from the router.”
“Very tiny! Smaller than expected but this means you can fit it anywhere. Product quality is excellent as it is the documentation and support. Delivery (in UK) was fast.”