No need to get a Pro Controller, I mostly just use detached joycons (hate the grip).
If you do want a Pro Controller experience then get an 8BitDo adapter for less than half the price. It'll allow you to use pretty much any controller on the Switch and you probably already own one.
You can use PS3/PS4/XBO/Wii U Pro controllers on the Switch with it and they work exactly as a pro controller would. I'm not sure about the others but the PS4 controller even supports motion controls with it. Though be warned I don't recommend using multiple of these adapters for splitscreen on the Switch at the same time, they seem to interfere with each other. But it's much cheaper and more versatile then just buying a Switch Pro Controller. If you ever game on PC you can use it on that too.
