Bought this to house my growing collection of rpi systems. Mounting and din rail adjustment are super easy. My only complaint is if you push the din rail mount forward, you have a lot of wasted space behind the din rail.I opted to purchase a sheet of anodized aluminum (roughly 6.5" x 17", from onlinemetals.com) to place bihind the din rail. The frame has a "shelf" that the metal can sit on. I use this space for external USB drives that don't fit otherwise in my server rack.I'm using this to support a Raspberry Pi cluster sharing a common power supply. Before I made the purchase, I was slightly disenchanted by the high price. There wasn't anything else like it in a price that I expected, and I really needed it, so I begrudgingly made the purchase anyway.Well, I'm pleased to report that this bracket not only met my expectations perfectly, but it turned out to be much higher quality than I was expecting. It mounted into the rack easily, and everything is quite solid -- no flimsiness, even when fully loaded.I still feel like it's a bit overpriced, but I'm happy with what I got anyway, and I would recommend this one without hesitation.The DIN mount is very thin metal. I had a very hard time getting a Cisco DIN mount switch to click on the DIN rail. It twists and actually bent. I do not recommend this product if you have heavy duty devices to mount.Is it expensive? Yes. But that's because it's not a common enough thing to produce a lot of. Supply & Demand.Does it function as expected? YES! I have one of these for a row full of RaspberryPi devices, and I'm planning on buying a second!Seriously the coolest thing. I needed to mount some DIN relays and power supplies in a rack and was having a hard time finding anything. This is good quality and slides and locks where you wand and also includes 3 different DIN styles to make sure it will work for your application.Works as advertisedI used this to build a raspberry pi cluster. It’s holding 10 pi’s, but it will probably hold 20. I wouldn’t hesitate to buy it again!The 5 rectangular slot does not fit my usb hub.As such I can only fit 1 at the left, 1 at the right and 1 in the middle.I would be better off replacing this casing with a rack mount usb hub with 24 ports.Excellente qualité, le rail est réglable en profondeur, solide, bien terminé, réglage facile par écrous papillon, s'insère parfaitement dans un rack 19poucesPermet de fixer des modules au format DIN ou plus sur un rack