I have tried all 3 type of arduino/genuino uno clone boards now. so going to write the pro and cons of all this
1st the genuine board from http://www.arduino.cc
no issue at all very well built and do what says on the tin, only issue is £20 so it’s bit much to try crazy experiments or even to leave it some where.
2nd one is a clone
It’s exactly like the genuine board but build quality is ok but can’t compare to the original but this has exact same chip set even for the serial to usb to serial chip is same (atmega16u2) compare to other clone brands I tried this one is better. had no issue. reason to buy this is it’s only £8 so I use it where there is a chance of chip will fry etc
3rd one is unbranded clone
nothing wrong with it same as above but it’s uses a CH340G serial to usb chip which is require drivers. even on the drivers you have to allow unsigned kernel extensions for this is install this drivers.
If you have a old mac dedicated for this work then fine. if you use your own machine this is risky. windows same (I think)
this board is only £3 pounds with delivery. you can use this for through away projects