I had a fan failure on one of these devices and uctronics immediately sent a replacement device. Just thought it might be helpful for anyone interested in their warranty policy. Friendly people Not leaving any feedback on them, I am very happy with the PoE device itself. I'd say my only complaint is that the screws holding the boards together are a bit difficult to tighten, but it's by no means a deal killer. I like the size of these devices. TIP: If the fans are too loud for you, you can install a lower speed external fan (I used a spare fan I had) and point it towards the Pis. Apparently it doesn't take much airflow to keep them in the temperature range that keeps the fans from turning on.
Vilros Raspberry Pi 4 4GB Complete Starter Kit - Black Fan-Cooled Aluminum Case for Heavy-Duty Performance
12 Review
Gikfun Screw Shield Expansion Board: Enhance Arduino UNO R3 with the EK7007 Add-On
11 Review
GeeekPi Raspberry Pi Cluster Case with Cooling Fan and Heatsink for Pi 4 Model B, 3 Model B+ & 3/2 Model B
11 Review
LAFVIN Super Starter Kit for Arduino R3 Mega2560 Mega328 Nano with Detailed Tutorial - Compatible with Arduino IDE
11 Review
36-Pack Black Rubber PC CPU/Case Fan Screws/Rivets Set for Computer
11 Review
Comprehensive 500pcs Laptop Screw Kit Set for π© IBM HP Dell Lenovo Samsung Sony Toshiba Gateway Acer
12 Review
M.2 Screw Kit: Easy Mounting for NVMe SSDs on ASUS Motherboards
19 Review
MacBook Retina 13-inch (A1425, A1502) and π© 15-inch (A1398) Bottom Case Screw Set with Pentalobe Screwdriver
11 Review