DH and I have done it, more than once, lol. We ended up bankrupt soon after, but we weren't careful with our credit cards after we'd cleaned them off. The interest rates on consolidation loans isn't really better than credit card interest - sometimes worse - at least the places where we were able to get them.
If you want it to work for you, what you need to do is clean off the credit cards, put them away for EMERGENCY use only...and then slap as much money as you can on that consolidation loan. At least with a consolidation loan, the payments will eventually get you somewhere, unlike a credit card where the interest adds up and adds up so you end up paying just interest most of the time. In my experience, the minimum payments for consolidation loans is quite a bit higher than the minimum payments for credit cards, though.