Any real world use cases implemented already? In other words does the code have bugs?
No this is 3-4 years tested. A contract has never been lost in BitHalo or Bitbay.
Its been used in the past to buy/sell coins and mining gear, someone sold playing cards on the markets... various sales happen now and then. We want to see more people using it. And since this thread advertises guarantor contracts you don't have to deposit at all, only the guarantor takes the risk, pays you a dollar to learn it.