Blimey. I'm sending DS1 to school in September, to a local 'satisfactory' rating school. I don't have any other options, as we are in a rural village (probably one of those described as "in well areas, where performance is not necessarily inadequate but has failed to impress"). It's been satisfactory for years and years. I know very little about the education system, other than Ofsteds, SATS and speaking with local mums. In one way, the idea of sending him to an 'inadequate' school fills me with guilt and fear, but then I think if something does give the school a kick up the bum to improve teaching, it's worth it.
I'm also sure after a few terms, my opinions on education, schooling system will change, once I know how the school works and have first hand experience. Hopefully that will give me confidence that its Ofsted's 'satisfactory' rating has undermined. At the moment, all I have to go on, as I say is Ofsted and SATs and local mums opinions.