“This is the best case that I've had for a RPi, as it is so easy to open, fit the RPi and close. However, the RPi4 CPU runs very hot, even with a heat sink, so, IMO, needs a fan. There is no provision or space for the inclusion of a fan.”
“The case is well made and a good tight fit which comfortably holds the Pi in place without needing screws. The only criticism is that it would be convenient if there was a way of fixing the case to the wall/desk/shelf/etc without needing to remove the Pi to put screws through the back of the case. A couple of external lugs or a keyhole cutout allowing the case to be slotted over a screw head would be a nice addition.”
“With the case closed, the pi can go up to 70 degrees but if you remove the cover, the temperature in around 65 degrees. Tested at noon in Japan when the temperature in the room is around 35 degree. All degree are in celsius.
I suggest buying extra heat sink if you want to use this case.”
“This case is robust and well designed in every other way except for heat management. The total lack of ventilation holes makes it unusable without some modification. I ended up cutting a square hole in the lid above the CPU and mounting a heat sink protruding through the lid there.”
