Anyone got any experience? For my wife, round house usage.

Not directly, a guy I used to ride with seemed to like them (whilst cycling) though. Does she have Raynaud’s or similar? Seems a bit overkill just for general wearing around the house (I’d have thought the thick slipper sock things would be fine for that unless she does have circulation issues). Batteries would probably be a hassle if wearing for hours each day

Heated insoles might be bit easier solution, depending on footwear?

Just for the evenings indoors. So no footwear.