With any incubator/ accelerator you should perform due diligence. Have they backed/helped build any successful companies? Talk with some of those founders and ask.
San Francisco: Fullstack and Ruby Engineers + CTO for OkCupid Labs
Us:
Building new products that connect people in love, life, work, and beyond
Small product teams where your ideas become brand new companies
Work fast, have fun, ship often
Brainstorming
Prototyping
You:
Startup experience and enthusiasm for new product ideas
Open source software projects
Ruby fluent