The Credit People offer a simple way to check out their services: pay an initial fee of $19, which includes your credit report (a service often not provided by credit repair services) and see what you think for the next 7 days. If you choose to continue using their credit repair plan, you'll pay a flat fee of $79 per month. The service can be cancelled at any time, and an "Unbeatable Satisfaction Guarantee" allows you to get a refund for one month's service fees (this is assuming you cancel as soon as you're unhappy, not months after the fact).
Unfortunately, Credit Repair has lost some credibility within the industry. Why? According to the Better Business Bureau, the company was asked to prove their claims that the average customer sees progress every month while using their services - even seeing improvements in the neighborhood of 7% of questionable credit report negatives being taken off their credit reports every 30 days. As of the date of our review, the BBB was still reporting that they had not received proof of those advertising claims. Those claims are still prominently featured on the Credit Repair website.
Of course, if keeping accounts open and having credit available could trigger additional spending and debt, it might be more beneficial to close the accounts. Only you know all the ins and outs of your financial situation, and like thumbprints, they're different for each person. Make sure you carefully evaluate your situation; only you know what can work best for your financial outlook.