I'm very happy with it. Most of the time I use roms on the SD card but the screen and original form factor are great for GB games. Certain games I use the cartridge for the display modes. The DMG filter is amazing, it even replicates the ghosting on the original system.

If you're a Gameboy enthusiast, you'll love the device and the bonus of playing other systems and arcade games is icing on the cake. Otherwise, a cheaper handheld or a steam deck would be a better option.