I can vouch for a Wacom Intuos too! If anything, a cordless one just makes it easier to put it aside. As for size, medium was basically the only size I could find anywhere here where I live, but I think it’s a perfect size. The pen also comes with backup nibs/tips inside it if you unscrew the end (which I didn’t know when I went to buy new ones for the first time hah).
Omar is right, it’s a good option for when you’re just starting out and don’t even know if you’ll end up using it all that often – and it turns out I barely use mine. But for the times that I do, I think it was a great choice!