Is the sightseeing private or a group?+
A group. The operator states it plainly: all sightseeing from the cruise runs as a shared small group of roughly fifteen people. Your airport transfers are by private air-conditioned vehicle, but the temple visits are shared with other passengers from the boat.
Are domestic flights included?+
No. Domestic flights are excluded on this trip, along with international ones. You need to get yourself to Luxor for day one and home from Aswan on day five, and both are separate bookings. You are met at Luxor airport and dropped at Aswan airport.
Which direction does it sail, and does that matter?+
Luxor to Aswan, which is the classic direction and the longer of the two by a night. It ends in Aswan, the calmer of the two cities, rather than starting there. Sailing the other way is usually cheaper and one night shorter, and it ends with the busiest sites instead.
Which meals are included?+
All of them on board. Four nights of full board, starting on the day you embark and ending with breakfast on the day you disembark. Drinks on board are paid extra. The boats publish no drinks price list, so ask for one before you board. Bottled water in the vehicle during transfers is covered.
Can we add Abu Simbel?+
It is listed as an option on the final morning, before your flight from Aswan. Optional tours are excluded from the price, so it is a separate cost. By road it is three to four hours each way, which makes a very long start to a day you are also flying out on.
What is not included?+
International and domestic flights, your Egypt entry visa, extra meals and beverages, optional tours, tipping, and additional entry tickets. Tutankhamun's tomb in the Valley of the Kings is the usual example of the last one: a separate ticket bought at the site.
How much should I budget for tipping?+
Tipping is excluded from the price and it is expected. Allow US$10–15 per person per day for the guide and about US$5 per person per day for the driver. On the boat there is a crew box at US$5–10 per person per night, collected once at the end and split between the cabin stewards, waiters and deck crew.