A very interesting place, definitely worth a visit at least once. The mosque is now being used as a museum, and the architecture is very interesting. Entrance is paid: there are benches and flowers inside, it is clear that this place is being watched. There were no guided tours on the holiday, only self-guided tours. I think it's better to take a guide - it will be more interesting.
If you come to Zharkent for a visit, business trip, or work, you should definitely visit the Zharkent mosque. In my opinion, it is the main attraction of the city. And always with a guide. It's not expensive, but it's worth it.