I go to Mamaia every year for more than 20 years and i never met hotel staff so polite and also helpful.
Brand new modern hotel with big rooms, free breakfast, free covered parking (with 24/7 security and cameras), free pool acces, free beach sunbeds (wich are 11€/per person per day if not staying at Nyota), free coffee in the room, room service, rooftop bar, heated pool.
I will come back happy!