I know of a few people that have purchased their homes in that way and that made out & I also know of more times when landlords have benefited from the higher rent that they received & the deposit that they were able to keep when the renter/buyer couldn't perform (primarily because the buyer hadn't corrected the credit issues they had that prevented their purchasing in the first place).
So: yes, it can be a good option but be aware that you (and the home) will still need to be able to qualify for your loan to complete your purchase and that you want an agent to help you write the contract that knows how to structure the deal equitably.
The other agents are also correct that in a hot market that it will be very hard to find a rent to own opportunity because there are so many buyers willing to purchase now at top dollar~ so why should a seller wait?
And that gets to finding available rent to own properties in your area. Few seller's have even thought to consider it so you need to create the opportunities yourself by approaching them with an offer. You will increase your chances of finding a seller willing to do it if you look at homes that have issues making them harder to sell (i.e. have repair issues, are on busy corners, stink because the previous occupant was a cat hoarder, etc). though you will probably have better luck by approaching landlords (they are already used to the idea of collecting rent and maybe already considering selling).