I disagree with the generalisation implied in the headline to this thread, "Low cost carriers and customer service". I fly over 60 sectors per year, mainly with "low cost" carriers, but also from time-to-time with "legacy" carriers, sometimes long-haul in business class. I have noticed no particular pattern when it comes to poor customer service and would not single out "low cost" airlines as being particularly bad. For example, although the boarding process for "low cost" flights can be very chaotic and disorganised (easyJet can be particularly poor in this regard) I have had similar experiences travelling Club World with British Airways.