In the Spring/Sumer of 2011 I had Lifestyles come out and give me and estimate and quote of a back sliding door. This was installed to make easier access of a wheel chair ramp. The ramp was to be removed from the front of the house and put into the back for curb appeal. The measurements were done twice. Due to the width of the wheelchair, I was told that I should go with a double slider instead of a 3 window. The installation went problem free and done is less time than thought even though it stated to rain. There have been zero problems with the sliding door and it looks much better in the back or the house.