Visited in December, when temperature for sight seeing is reasonable. The trip from Hurgada is long, be prepared for all day trip starting at 5am. 3.5 to 4 hour ride to Luxor, the same back in the evening, gives you around 6-9 hours for the city. We took a personal guide, which possibly gives you some flexibility, because you do not wait for 20+ people from your bus to take photos or visit bathrooms at every Luxor site. If you like ancient Egypt it is a great must have trip, you will see the stunning monuments you know from all the documentaries. What to be ready for: a lot of tourists, a lot of local "hunters" who try to squeeze money from you by all means. Whether they offer you to take picture with your phone, whether they allow you to go behind the barrier, always keep in mind it is for something. Pay extreme caution when they offer something for a dollar. Once you have the thing pushed to your hand, or worse, once you get dragged into their shop, nothing is for a dollar anymore. In extreme cases you may end up locked in their shop, forced to buy something to get out. If you do not want to have a bad experience, be careful, be ignorant. Watch out when paying by card at such places, especially if you just want to get rid of them after being pushed to such situation. It is a tourist hunt / trap, keep that in mind. Same applies to beggars on streets, especially kids. Of course, one dollar or euro given to a poor street kid is nothing for you, you may think you're doing good thing, but realize that these kids often roam on streets to get these 1eur donations instead of being at school. Often it is organized beggar gang. Imagine that salary is somewhere around 120 dollars a month, which is hard to live with, many locals have 2 jobs. If a kid manages to get even 5dollars a day by begging on a street, it effectivelly earns more per day than its parents... But what will be future motivation of such kid? Only the street. Keep your tips for staff at your hotel, who often relies on it heavilly as it forms quite some portion of their income. Also, if you decide to buy something, barter. They expect it and the first price they give you is often 2-3 times more than necessary. At the end it is up to you and your consideration. To Karnak itself, just stunning, monumental, must have been something extraordinary back then when it was full of colorful paintings from ground to the ceiling. Enjoy.