The idea is quite simple, instead of renting out a house for a couple of weeks you make a deal with someone and switch houses for the duration of your holidays. You stay at their house, they stay at yours, and both parties have free accomodation! I've never tried it but it seems like a great way to travel for cheap, and also allows you to profit from your own house instead of leaving it empty for the duration of your trip. I can certainly see some risks and also travel dates may have to be a bit more flexible. Has anyone tried it? Or does someone know of any reputable websites offering such services?