What is a Home Exchange Vacation?

What is a home exchange vacation ? 

Definition : you swap your home for someone else's home
So you both enjoy free accommodation

Advantages :
- you save a lot of money because hotels aren't cheap
- you can save more by swapping cars
- you can look after eachother's pets
- you can cook your own meals
- you can enjoy a comfortable home base
- you can live like a local and get a real feel for the places you visit
- you can meet new people and make friends