Not sure how you would be better off here. All of your cc's are at 10 or 11%, but the loan is at 11.99%? That's going backwards in the amount of interest you will pay. It also offers up the temptation of using those credit cards now that they have no balance on them. Really the only benefit I see is the lower monthly payment if you are really strapped for cash, but since the rate is higher you are better off continuing the way your are if you can handle the payments.
Seems to me you would be better off calling your cc's and seeing if you can do some balance transfers (at much lower rates than 11.99%). Get it down to 1 or 2 cards at 4 or 5% and you will be much better off than this scenario (in my opinion).
Good luck, I hope it all works out for you!