This dress sandal is extremely comfortable, in part due to the extra padding in the ball of the foot area of the shoe.  The shoes are true to size.  I have worn them several times, for long periods of time standing and walking on pavement and/or concrete floors.  Surprisingly my feet were not sore the next day as they are with most shoes of any type, nor did the shoes pinch or cause swelling...I am prone to both.
The closest thing I could compare the comfort to is my orthotic flip-flop sandals...LOL.  They are just unbelievably comfortable.
They look great on my feet.  I have had so many compliments on them.  I would highly recommend them.  I usually have to have special shoes and really did not expect to be able to wear them, but was I ever wrong!  I loved them so much I bought another pair in a different color and pattern.  It is great to be back in heels again!