We saw one crawling on top of the bed (our second day), and sure enough, looking at the sheets, there were blood spots. I tried to pull apart the bedding, and there was a zippered enclosure, so I could not examine the mattress. I took pictures of the bug (now dead), and the sheet, and went to guest services. First, they offered to come in and deep clean; I said we wanted a different room, and we were moved to a different room (not an upgrade). When I reported it to Customer Service after the cruise, we received a future cruise credit. This was our first negative experience after many cruises, and I felt it was treated appropriately. If this ever happens - take pictures. When attaching to my letter to post-cruise Customer Service, a picture was worth a thousand words!