I have helped a couple of my clients find good rent-to-own aka "Lease Options" and they do exists.
I generally advise that my clients seek the assistance of a real estate in reviewing our lease option contract because there are many variables to include in the contract and we want to protect the buyer from all corners!
I'd be happy to get more information from you on what type of home and in what area you are looking for rent-to-own opportunities.
Also, beware of the craigslist ads that have you pay to see a list of rent-to-own opportunities. This is a scam. :(
Thanks and I look forward to speaking with you soon!
Your Castle Real Estate