Since it was peak season and I was traveling with my mother, I booked a fast-track ticket for convenience. I usually explore museums and palaces thoroughly with audio guides even when traveling alone, so I booked the fast-track option (including an audio guide). However, I later found out that this didn't include the Harem section. To add the Harem, it would cost an additional 1040 Lira, which is about 35,000 won, if purchased at the internal ticket office. In hindsight, it would have been better to buy a ticket that included a guided tour from the start. The palace is so vast with so much to see that it took us 3 hours just to look around on our own. We visited on a Sunday, and there were long queues at each section. So, I thought it would have been more efficient if a guide had pointed out the key locations and must-see items. Also, the audio guide included with this ticket is not the official palace commentary but a much more concise version. While the official version might be better for those eager to learn when exploring alone, on a day like today when we were just enjoying the beautiful and rare artifacts, we didn't really listen to the commentary anyway. So, it wasn't an issue. The ticket is exchanged inside the meeting point (Bistro), and at the designated time, the host personally escorts you into the palace. It was nice to arrive a bit early, have a drink, and wait comfortably. The host spoke English clearly and distinctly, which made me think it would have been even better to have an English guided tour. Anyway, the conclusion is that even a simple guided tour is better than none, and if you're going, I recommend a tour that includes the Harem section. However, I don't regret exploring freely, and I was truly happy because Topkapi Palace was so magnificent. With its panoramic views, architecture, and the artifacts and jewels inside, despite the expensive entrance fee, it's a must-visit tourist destination that I highly recommend!