Fortunately, summit day couldn't have had better conditions. There was no wind and blue skies (mostly). Had the weather been anything other than this it would have certainly changed the difficulty rating to extreme. That said, we were climbing into the Death Zone where there is a third of the oxygen than at sea level. Climbed through the night which is always cold and seems to go on forever but all was well! Then we had a long trek to the summit which we arrived at about 3pm. This is usually later than usual on an '8,000er' but we were held up by deep snow. All went well though despite the odds!