I stayed at this hotel for 6 days in May 2019. To eat breakfast for this hotel you have to go across the street. You have to go there another Hotel, Hotel AdonisCapital. There's a Mcdonald's across the street from Hotel Adonis Plaza. This hotel is like 5 blocks away from the tram stop Fundacion. A few blocks south of there is the main bus terminal. The main post office for Santa Cruz De Tenerife is a block a half away.
The front desk staff speaks excellent English, like Mouna and Jose. Mouna told me what bus to take to get to Puerto De La Cruz and Loro park etc. Jose was helpful to about how to get to Siam Park, Teide, etc. The hotel has luggage storage.
My room had a few outlets, the wi-fi was great. I had a safe, air conditioner, Flat-Screen T.V, desk, phone, double bed. This place is smack dab in the middle of everything. I'll stay here again.