I am on both Couchsurfing (my fave b/c of the references and user friendly aspect of the website) and Warmshowers site as well as some others. I have only hosted once from Warmshowers and it was a fantastic experience - we loved them so much, we wanted them to stay! One of my favorite guests of all time from Couchsurfing, came to stay for a night with his dog and stayed for a month and I live in a small apartment, but he fit right in and he could have stayed forever!

I think these sites are a fantastic way to make the world a smaller place - in fact we had a traveller show up early this morning. We are out of town this weekend, but she will be crashing at our place. I can't even say how many have stayed at my place over the years. Most have been amazing, a couple of duds, but in the span of my life I have met way more than a few duds! Definitely leave feedback regarding the guests even if you didn't end up hosting them, just explain the situtation so that others are made aware of it and can decide for themselves.

I have also been hosted many times and have met so many wonderful folx along the way - many, many incredible stories along the way.

Have hosting and surfing!