I am a huge fan of FSBO, and before i was licensed in 2008 I actually leveraged these services (Owners.com, FSBO.com) to sell a couple of homes on my own...successfully. Just know what you're signing up for.
Know that you have no legal protection (unless it's part of the service), your marketing is "limited service" (presentation...quality pictures are key!), FSBO sellers are likely to overprice (#1 listing mistake) and the ultimate responsibility for contingency management is on you once you're ratified. Then there's the process of showing to prospective buyers. You're letting complete strangers into your home, which you may compensate for by following them around from room to room...but would you want that as a buyer?
Upside - I loved the process of home preparation, marketing, driving offers, negotiation and "Contract to Close" process so much...I decided to make it my full time gig going on 9 years!