Perfect location. Terry's apartment is very centrally located on Grassmarket. Yes, there is a view of the castle out the front door. Great neighborhood for pubs, restaurants and local sights. We were out late a few nights but never felt uncomfortable walking back. The apartment is up two flights of stairs and then down multiple hallways but really not a big hassle. The large studio was very clean and comfortable - the bed was comfortable - small kitchen but it had everything we needed. Would definitely stay again.