My first time in Mexico City was not as good as I had hope for, and unfortunately this was partly due to our stay at Block Suites.
Check in was easy, but once we got to the room we noticed some issues. The mattress was dirty (stains, hair), and the refrigerator was not working. We took a taxi to dinner, as the surrounding neighborhood seemed less than safe (shuttered storefronts, graffiti). Once we returned for the night sleep was not easy due to loud traffic from the street and mosquitoes buzzing and biting.
All in all, this wasn’t the worst place in the world, or in Mexico City for that matter. But, for the price you’d be better off finding another location.