I purchased an annual subscription to MyCleanPC. Subsequently, I have been billed a follow-up $19.95 monthly "service" charge that I have not authorized. This is highly unethical, in my opinion. Make sure you read all the fine print before giving this company your credit card information, and monitor your statement for unauthorized charges.
Tip for consumers: Exercise extreme caution before using this company. Remember that the price you pay for the software is just the tip of the iceberg when they follow up with the monthly "service" charge.