Over the years, I've cooked them many times, because that was all that I could find easily. There are some brands that always taste "hammy", like Tyson. Others just turn out with less flavor from the rub, to me.
For a long time, considering the time and effort I put into the cook, I am willing to pay for unenhanced.
Also, there is a hidden cost. Part of the per pound cost of enhanced ribs is the enhancing liquid. In this case, you are paying $1.59/lb for a liquid that is poured down the sink. A figure aquarists use is 10 pounds per gallon when trying to determine the weight of a salt water fish tank.