One thing with the CCCS types of companies is that you need to remain involved every step of the process. Don't expect that they will take care of it all for you.
1) make sure that your creditors accept their plan. Care One Credit don't have to and some certainly may not. If they just start paying them what they feel like without having the creditor accept the deal, then your looking for trouble to be entered into your credit reports.
2) make sure you keep making your regular payments to your creditors until you know that they have been paid. Most people assume that the creditors will get paid by a CCCS (like Care One Credit) and it won't make them late since they are in agreement with the CCCS. That's the key here though - you are in agreement with the CCCS and may not be yet in an agreement with the creditor. Some people go 30 days late in the process of waiting for a cccs to pay their first payment, and it just dominoes from that point on and the person never finds out until they have many 30 day lates on their credit report.
Just make sure you read, read, and read some more if you choose to take a CCCS route. Know who and what you are dealing with before you agree to anything. Some people CCCS saves them and works out for them, others make the situation much worse for them by working through a CCCS.
CCCS (like Care One Credit) in my opionion truely should be considered as a case by case basis. It isn't for everyone - but that's my personal opinion.