Review on 2020 Latest MazerPi 3.5 inch HD Raspberry Pi Touchscreen with Cooling Fan and ✨ Case for Raspberry Pi 4 Model B/Pi 4b - 480x320 Resolution, 60+fps (Screen with Case) by Mark Loredo

Very easy to assemble and the screen looks good but is designed to only use the screen or the fan, not both. With a bit of tape I was able to position the fan so that it partially covers the processor and has enough clearance for airflow. A lower profile cooler might fix this. The screen only works accurately with the included stylus, but doesn't work for single taps despite calibration; You have to click and then move the cursor to the right places. The resolution is too low to fit anything in Raspbian, even with upscaling. It would be nice for a custom program made for display size. The screen connects via a gpio hat instead of an HDMI ribbon and takes up the entire gpio. I had to strip the fan wires to connect them to the screen. For some reason soldering the fan to the marked fan contacts on the display board didn't work.