I have reviewed with the county for 5 years.
They have all been good experiences.
Our county homeschool coordinator is wonderful. He runs early reviews in October-November for new homeschoolers to answer questions. Otherwise you review in Jan/Feb and again in May/June.
The basic deal is show at your local library at a time you chose. A handful of reviewers will be at desks and will take families individually. You show/tell them what you have been doing in the standard areas: Math, LA, Science, Social Studies, Art, Music, PE.
They have check boxes for Schedule, Computer, media/Library, and Field trips. They aren't essential, but I like to bring a page from our schedule, a list of current computer educational computer games/sites they are using, a library receipt, and a list of field trips just to get them checked.
For PE they like pictures. I just list my kids activities and print a few photos of them playing soccer, swimming, etc.
The main thing to remember is are you showing "evidence of regular, thorough instruction." That only takes a list of what you covered or the name of the program and a few samples of work from the semester.
If you have any specific question feel free to PM me.
Sarah