Just that really. They are well pricey but DS has his heart set on one, mainly because he wants to play Mario Odyssey. I bought all 3 of my kids Nintendo 2DS XL last year. All still happy, but one wants an upgrade (or rather wants this as well).
I'm worried it's not really worth the money, when he has something similar already. We also have an Xbox 360 which they mainly play Lego games on.
Also he knows I've said no to it and so has asked for it as a "Santa Test. Then we'll see if he's real won't we mum?" Little bugger.
So is Mario Odyssey (and whatever else comes next) worth the £300 it will cost to set up a Switch?