It does look amazing. I wouldn't necessarily furnish and decorate it the way the current owners have, but it's their house and their choices, so I really don't see the issue. If you buy it from them, then it's your house, and you're free to have the interior however you like it.
Not wanting to derail, but I never understand why indoor swimming pools in private houses bother to give space over to having actual purpose-designed changing rooms alongside them. Wouldn't you just use your own bedroom - or strip off at the poolside or just swim naked, if it's just you and your family?!