My friend's daughter had lice. She nearly drove herself crazy going through her daughter's hair and her other 3 childrens' hair. Plus doing all the clean-up, etc. She was never sure she was doing enough to make sure they didn't spread and to destroy all of them. I researched companies for her. She ended up using Ronna at http://www.nitwitz.com/index.html . She said Ronna was excellent. She came out twice I think and also did some counseling over the phone. My friend needed reassurance she was doing the right things and doing them the right way. The service comes at a cost, but sometimes you can't put a price on your time, your sanity and health. Even without using a service there is a cost involved with using products, lice combs, throwing things out, detergent, washing everything in hot water.
Hope this helps! Ronna was also good because she would come to your house AND she was the only one who would come to the west suburbs. It seemed to me that many of the companies only covered the north suburbs and the city.