Just returned and the staff DID remove towels and books off sunbeds left unattended. I was well pleased to see this done. About time too. However, other than at sea days there is not a problem as O/V has large supply of beds.
You can get the deck chairs at the front of the ship, where you can see the beautiful view. Around the pools tend to be noisy, cramp and wet. Have a good holiday.
Try back of ship on deck 8.
Sun beds are very difficult on sea days! Get up early and go to stern Deck 8 (can get very hot and crowded) or round Crystal pool. If you leave sunbed unattended for more than 20/30 minutes your belongings will be removed. This is a good idea as many people take too many beds and do not use them and others are searching all day to find a seat.
I never saw anyone removing the towels from the sunbeds and the " 20 minute rule" did not seem to be enforced. We looked everywhere for a sunbed and gave up in the end - not being inclined to join in the "towels on sunbeds brigade"!