Wool duvet - worth the money?

[Nightnight23]

My ds has been in sleeping bags until this recent hot weather. I'm looking at duvets and have seen good reports on wool duvets - help regulate heat etc. They're twice as much as a standard duvet but I don't mind paying if they're worth the money?
It would take away my worry of ds' room being warm in the evening when the heating is on and then cool over night in the winter. He's a wriggler and doesn't yet pull his duvet back up. Wool apparently keeps your cool/warm depending on what's needed so should theoretically stop him getting too warm earlier on in the night.
Only thing making me think twice is that we haven't gone through potty training yet. The duvet says it's washable though. Thoughts?

My kids have wool duvets. We brought them back from Australia, where they were common.

Wash beautifully, keep kids warm and cool (although I do have paper thin summer weight ones as well as winter ones), and are low allergy.

I'm not sure I'd have bought them if they were 'standard' at the time though.

We also have lambswool mattress toppers which I think help too. And certainly in winter, the brushed cotton sheets seem cosier. For little ones, do the duvet sideways, then you can tuck it in so it doesn't fall off.