The hotel is not bad. Mostly business travelers come here, but you can also come for a vacation. In winter, there is an indoor swimming pool with Jacuzzi, sauna, massages and hammam for an additional fee. In summer, an outdoor swimming pool with a mini water park is added. A pretty good option for an economical holiday. However, their prices are different for locals and tourists (if there is an ikamet / worker, then you can stop by at a price for locals). The rooms are different, there are good ones, if they are killed with mold, check on arrival. The rooftop restaurant is pretty awesome, it's cheaper to eat in the city. You can get there by minibus from Yalova or by ferry from the suburb of Gebze
Everything is good there: service, cleanliness, and food. The restaurant is wonderful, in terms of food, and the people work great, professionally, they know English.
A normal hotel. With a standard set of services for 4 stars. The price tag of food in the restaurant is high relative to the area. Breakfast is a buffet, but there is nothing to eat for a European. The rooms are tired, but there is a VIP, it's better there. The staff is not attentive, but this is the norm for Turks.