It depends on what you are pulling it with. If you have a dually, or a diesel truck that is set up right, I wouldn't spend the money. If you are using a half ton truck, a tahoe or something that isn't as beefy as the above mentioned, an equalizing hitch can significantly help the handling of the vehicle on longer hauls. I would definately recommend them in this situation. The only drawback in my experience has been trying to navigate tight situations. The set-up I used had brackets that bolted to the trailer. The bolts would bend in a sharp turn. Perhpas there are newer models out now.
Good Luck.