If you are going to Yalta, then TMM-Yalta is an excellent choice. Clean rooms (cleaned every day, change wet towels) Each room has air conditioning, a refrigerator, a TV, a large loggia with beach furniture.
If you want to spoil your vacation and spend money, then you are in Monsoon. On the website of the LASPI tour operator, this boarding house is positioned as a 3-star beach hotel, built in 2003, but in fact it is one of the buildings of the sanatorium named after.
I highly recommend relaxing in this boarding house. Everything is great, the rooms are clean, the staff is attentive, the rooms are cleaned every day. The territory is well-groomed.