I have had problems with extremely flat feet the majority of my life. I've tried just about every tennis shoe brand in the market. About 6 months ago I purchased a pair of these Brooks Addiction 9 running shoes, and now I'm fully convinced I will be sticking to this brand. So here's the run down:

PROS:
very supportive if you have collapsed arches and extreme flat feet.
Eliminates back pain, and knee pain due to the higher platform of the shoe.
Sturdy.
Corrects rolling motion of heel, ball of foot strike.
Good shoe for cross training.
Accommodates custom orthopedic insoles.

CONS:
Expensive, when they first came out they were closer to $130.00.
Look like diabetic orthopedic shoes, not at all attractive.
Not much of a selection in colors.
Bulky, and slightly heavy.
Look big on the foot.
They have to be broken in, till they mold to your feet.

Regardless of all the cons I'm to the point were I prefer comfort and overall pain free workouts, over the looks of the shoe... highly recommend this shoe for one who is a severe over pronator, who is tired of foot, knee and back pain due to wearing ill fitting shoes.