We stayed at Tanzanite for 2 nights before going on Safari. The room was really big and comfortable, the breakfast was ok and the hotel is really well located, close to everything.
However, you only have hot water in the shower for a few minutes, since there were three of us, the last person always had a cold shower. Although, I know this is an issue in the whole country, for the price we paid, I didn't expect to have cold showers in this hotel.
Be prepared to wake up very early with the mosque's prays.