I was very reluctant when my son's wanted to go out with these security companies during the summer but it's worked very well for them. One made $40,000 last summer and the other $25,000 and they were just installing last year. My oldest graduated this year with no debt and will have some put away for grad school and my youngest is selling this year and ahead of last years pace. They had both failed the first summer they tried it but kept after it and have done well. They both spend money like drunken rock stars and to slow them down I tell them stories about earning $350 a month, while I went to school and living off of that but it hasn't seemed to work.