Dar Balthazar is located in the Dar El Bacha area of Marrakech a 10 minute walk to the main square or the souks. We strongly recommend that you use the airport transfer service as the riad is a short but winding walk from where a taxi will be able to drop you (as are most of the riads I believe). The transfer service means that someone will lead you on foot from the taxi to the riad's front door. The route is not at all complicated once you work it out yourself, but the first time would be crazy without the help! Their transfer service collected us at the arrivals lounge and got us to the hotel easily.
We were in the cheapest room in the riad which was small but clean, airy and comfortable with an en suite bathroom. The room was on the ground floor so at times there was noise from the central courtyard when other guests arrived back later or breakfasted earlier than us. In general though the riad was a relaxing and restful haven from the bustle of Marrakech.
The members of staff at Dar Balthazar were unfailingly welcoming, courteous and helpful assisting us with airport transfers and translation of emails from the hamman we booked.
We breakfasted at the riad each morning on bread, pastries, delicious Moroccan pancakes, orange juice and coffee. The only detraction from the riad's overall rating is that the bread and pastries, maybe due to the weather or delivery schedule, were not always very fresh.
Overall we would heartily recommend Dar Balthazar; it's a lovely little place and excellent value for money.