It's hard to say if it's worth it - sometimes it is, sometimes it's not. Be very careful who you hire to help you. Make sure your are getting your money's worth and not just paying for something you can easily do yourself.
I have heard a lot of bad things about both credit repair agencies and credit repair attorneys. There are a lot of scams out there related to collections, credit, credit repair, etc... .
The main benefit you would get from having a good attorney is that he / she will be able to get things done that you cannot. I practice mostly family law but got into helping with debt issues because when a couple splits there are often credit issues (like when the judgment orders a husband to pay the $20,000 credit card, he files bankruptcy two years later, and the creditor sues the wife). That evolved into also helping people when junk debt buyers buy old debts and re-age / re-report the debt to credit bureaus to try and collect (or worse - cons the person into reaffirming the debt). It has just accidentally grown from there.
The fact is, most of the stuff you can do on own (i.e., negotiate pay for deletes, negotiate down the debt, etc... .). But the fact is, the creditor, collection agencies, and even the credit bureaus will deal with an attorney much differently (read: reasonably) than with the debtor. Why? - I don't know. Is is right? - No. But it is the same way with most child support enforcement offices too. So, do as much as you can on your own and then if the creditors and collection agencies are being rude to you, difficult, etc..., it may be worth seeing if an attorney can help you make more ground.
Good luck - I'm sure you'll make the right choice.
