It's a good train station. You can have a delicious meal. And near the train station too, at very reasonable prices. The bus station is nearby, which is very convenient. People respond to the appeal and questions kindly. Taxis are not expensive. There is a market nearby. I recommend buying good tea and delicious sweets. Believe me, Kazakhs know a lot about tea☝️
Petropavlovsk is a very friendly city. I was in it both in winter and in summer. A cozy, clean town, a wonderful street for pedestrians, there is a park. The station is pleasant, the forecourt is large. I advise you for further transfers in Kazakhstan.
I pass through this station all the time. The station is spacious, there is an escalator to the second floor, many seats in the halls. There is a mini-hotel on the second floor, you can eat there, take a shower. The rooms are normal, the beds are clean. The service is at the proper level.
There are grocery stores near the train station, as well as a Magnum. The prices are reasonable.