I've had nothing but amazing experiences with CouchSurfing.

New Years Party in Budapest;

A haunted house trip in Philadelphia turned into being a pretend boyfriend for a girl in Ürümqi and a week later flying to Maldives with her best friend;

Playing ice hockey with the President of Finland;

Having a fling with a famous Japanese MMA Fighter;

I even started my website www.uncivil.engineer because of it; sad to see.