Booked half board for 2 adults and a child through them. My spidery senses tingled so I checked with the hotel and they'd only booked for 2 adults, and only breakfast.
Try as I might I could neither get them to comprehend the issue, or accept fault (preferring to blame the hotel somehow).
Long story short: don't be like NotJohn, don't use priceline - your stress levels will thank you