The Nintendo Switch controller can only be used on PC via a bluetooth connection, so if your computer doesn't have bluetooth you'll have to buy a USB dongle. While the controller is detected through USB, but doesn't actually let you use it through USB. (I know, I tried on my bluetoothless desktop gaming rig. Only got it to work when pairing it on my laptop with bluetooth).

As for actually using it, it's certainly playable. Though I'd imagine it might take some getting used to to do the D-pad abilities since the sticks are asymmetrical.