Anyone got a home sauna?

[SpotTheGreatPony]

Thinking of getting a sauna and cold tub at home.

Anyone got one? How much does it realistically cost to run? Any drawbacks I might not have considered?

thanks

We have an infrared sauna - I love it but I've never looked at how much it costs to run cos if I did I'm sure I'd be appalled.
On the plus side it is never on for that long - ten minutes to heat up and then max of twenty in the sauna.