Bernardo has been doing our windows for 11 years and always does a good job, quickly and quietly. The price mentioned above is for a large house with old-fashioned aluminum storms, inside and out (his term is 4 sides), which is a bear of a job, because the old storms are such a hassle to handle. When they do just two sides, the cost is much less.
The thing I really appreciate is their care. Our previous company broke a window and claimed it was already broken; the other day I watched a cleaner for a familiar-name company totally trash a little tree while putting his ladder up, and several years ago saw another name-brand cleaner crush the house's aluminum eavestroughs by positioning the ladder incorrectly.
People seem to think anyone can do this job, but Bernardo brings skill (including some neat tricks of the trade that I won't disclose) and care to the work.