This lovely little piece of kit, which arrived nice and quickly from The Pi Hut, gives some of the best performance I've ever seen on a Raspberry Pi, short of an SSD attached via USB. It blows away every SD card I've tried on 4k random reads & writes, which means your OS is lovely and responsive. While it's not the cheapest in a price per gig sense, it really does bring an install to life, and would be excellent in situations where you need a low-power, minimal bulk solution, that's more reliable than SD cards. I was worried the device might not fit the cases I was using, Flircs for Pi 3's and Pi 4's, but I've had no issues with either case type. Figures from The Raspberry Pi Diagnostics Tool are attached.