Our family had a lovely time at Santiago's cool oasis in Mexico City, a wonderful respite from the busy city. It's very comfortable, with a great modern design (just like the photos). The beds and linens are all first-rate, and the park view made for a peaceful stay.
One note: while the location is officially Roma Norte, it's a 10-15 minute walk from the center of Roma and most of the restaurants there, but also close to Colonia Juarez. There's a subway stop nearby too.