Sound quality very good, although I prefer the bit more expensive Dragonfly Cobalt more (a little difference in sound, 80 € difference in prize). The drivers installed automatically, just like with Dragonfly Cobalt, took approximately one minute with my PC (Windows 10).
Likewise, the Dragonfly Cobalt is smaller (smaller than your pinkie, practically nonexistent, weighs absolutely nothing - whereas the size of Apogee Groove is 6x Bigger, while still very small). I am currently producing (composing, programming and mixing) music with Dragonfly Cobalt and Beyerdynamic DT1770 (which can be brought from Thomann, spectacularly good mixing headphones), but Apogee Groove would do the same job - there is almost no difference in sound quality between this one and the DF Cobalt.
The build quality is great, and there's the option to optimize settings (for hifi-monsters, which I'm not unfortunately).
If you're looking to boost the sound of your mobile device, DF Cobalt is the way to go as it does not drain your battery at all, and is ridicilously small (for Apple products, it comes with the usb/usb DragonTail appendage), but if you want to boost the sound of your pc/speakers/anything else than a mobile phone(ish device), you might as well go with Apogee Groove, since it's cheaper. DF Cobalt lacks volume adjustment buttons, which the Groove has - but the choice is yours, they are both amazing products.