Summary: After being told portable units don't work very well I was pleasantly surprised how powerful the fan was and how quickly it lowered the temperature. Installed in living room window with vertical sliding windows. Window kit not that easy to fit ; required a lot of duct tape to seal the gaps.
Summary: Bought first unit in July 2012. Its fan broke in a month. By the time company, repaired it, it was winter already. Started using again in summer of 2013. Its fan broke again in a month. Company replaced at the beginning of winter. Started using again in July 2014.