We’ve never had any reason to complain in 13 years of cruising, and can easily dismiss minor issues. But in the past 3-4 years, I have had my eyes opened to the problems faced by people with limited mobility. When you’re in constant pain, when you’ve had new hips and knees and when your spine is crumbling, excessive queueing and standing about is very very hard. Now my parents would never dream of complaining, but in such situations, the enjoyment disappears. Nobody expects wonderful 100% of the time, but it’s quite reasonable to expect a professional product, akin to what is advertised.