A simple ESP32(?) with a cheap onboard antenna in a grounded metal housing(printer) - so what will you expect regarding receive quality? Yes, quite bad receiving. The main software (adapted Marlin) (In my case the Tycoon Slim) isn't very well regarding wifi. Poor (sometimes really bad) translations(german) for wifi, additional errors in the (Marlin) code - missing time releasing for wifi and so on.
But it's cheap and when you expect nothing more than transfer your G-Code from your slicer to your printer, it will (mostly) work. So, for me it's ok.
