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 it didn't include the Harem section. To add the Harem, it would cost an additional 1040 lira, which is about 35,000 won, 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 and has so much to see that it took us three hours just to look around on our own, and we visited on a Sunday, so there were long lines at each section. 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 with a strong academic interest exploring alone, on a day like ours, when we were simply enjoying the beautiful and rare artifacts, we didn't really listen to the commentary anyway. So, it wasn't an issue. The tickets are exchanged inside the meeting point (Bistro), and at the designated time, a host personally escorts you into the palace. It was nice to arrive a little 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. In conclusion, even a simple guided tour is better than none, and I recommend a tour that includes the Harem section if you're going anyway. However, I have no regrets about exploring freely, and I was truly happy because Topkapi Palace was so magnificent. With its panoramic views, architecture, and the artifacts and jewels inside, it's a must-visit attraction that I highly recommend, despite the expensive admission fee!