TL;DR: 4/5 devices, definitely worth the price. Works great 99% of the time, but sometimes you need to disconnect and reconnect the mouse after it freezes when switching. The ports are a little tight, so be careful when disabling anything. Full Review: Like many people, I work from home and my office has both a work computer and my personal computer. There are times throughout the day when I need to switch between them for various reasons, but having multiple keyboards, mice, microphones, etc. has been a challenge. This basically solved that problem for me. My current home setup has a keyboard, mouse, webcam and microphone attached. If it had an extra USB, I would also plug my headset into it. Switching back and forth is easy, just press a button to switch back and forth between two devices. My only real complaints keeping this off a 5/5 is that there are times when certain devices, notably my mouse, freeze and need to be disconnected and reconnected to the Switch to get working again. This leads to my second issue (which has actually diminished over time) that the ports are incredibly narrow. I imagine you could remove your device's USB case if you're not careful with the slow wiggling. Overall, I'd recommend this to anyone with a similar home office to mine, although it might be worth investing in one with more ports.
Enhance Productivity with CKL HDMI KVM 2 Port 4K 30Hz Dual Monitor Extended Display (CKL-922HUA)
10 Review
CKL 4 Port KVM Switch Dual Monitor DisplayPort 4K 60Hz: Unprecedented Multi-Computer Control with Audio, USB 2.0 HUBS, and DP 1.2
11 Review
π TRENDnet TK-803R: 8-Port Rack Mount KVM Switch with VGA & USB Connection, USB/PS2 Support, Device Monitoring, Auto Scan - Control 8 Computers/Servers
10 Review
NEWCARE HDMI KVM Switch: 4K@60Hz, 2x1 HDMI2.0 Ports + 3X USB KVM Ports - Share 2 Computers on UHD Monitor, with Wireless Keyboard and Mouse Support - USB Disk, Printer, USB Camera Compatible
10 Review