Our stay at Şirehan Hotel was disappointing to say the least.
First of all, even though Expedia says this is a non-smoking hotel, it is not. As two non-smokers, our room was continuously filled with cigarette smoke and smell. When we spoke with the front desk about this, they confirmed that even though the rooms are "technically" non-smoking, people do smoke and they cannot enforce non-smoking policies.
Secondly, the Wi-Fi near our room continuously disconnected to the point where it was impossible to use it.
And finally the AC did not work properly. It was blowing cool air for sure but because of very poor insulation, it did not cool the room at all.
When we discussed these issues with the front desk, they were at least nice about it. But we ended up staying only one night of our 3 day Gaziantep trip. Got cash refund and booked another hotel.
I do not recommend Şirehan Hotel for those who want to visit Gaziantep. Especially if they are non-smokers.