I work 8 to 12 hour shifts constantly walking and standing on concrete and brick.  I developed plantar fasciitis, a condition which causes acute heel pain, as well as pain in my knees, hips and lower back.  I first tried the Spira Wavewalker DX3 walking shoe with the patented Wavespring technology, but these shoes did not alleviate the problem.  Based on the reviews of customers, I purchased the Brooks Addictions, and these have been a godsend.  When worn in conjunction with custom orthotics prescribed by my physician, all of the painful conditions I experienced previously have been eliminated.  If you decide to purchase these shoes, I strongly recommend that you purchase 1/2 size larger, and one size larger in width.