I stayed here for a night in June. I actually live in Medellin but needed a hotel for the night due to paint fumes in my apartment. Pictures are accurate. Staff couldn't have been nicer. Good, very complete breakfast buffet. Nice executive lounge. Beautiful pool and spa area. Also hotel is located a couple of blocks from Olviedo mall, so a perfect location if you are visiting Medellin.
I stay at the Bogota Marriott hotels quite frequently, and this hotel is nicer than the Bogota Marriott hotel.
I would say if you plan to visit Medellin this hotel would be a solid use of a cat 1-5 cert.