Review on Elevate your Raspberry Pi Cluster: Eau 4-Slot Stackable Case for Raspberry Pi 4 and 3B+/3/2 Model B – Clear Acrylic Case with Cooling Fan and 4 Layers Pi Rack by Mindi Gefroh

This device is not particularly reliable. After just a month, one of my fans started making an awful noise. I turned it off but now one of the boards in the middle is getting a little warm. To replace the fan I need to buy a replacement and then do some wiring to fit the custom cables required. Also, I have to power down the cluster completely to disassemble it and get to the center fan. For many users, the additional downtime doesn't matter much. However, if you're trying to optimize board uptime, you need a more robust solution.