Having two very young children, we wanted a clean and safe hotel. I'm also a patient at NIH and wanted a hotel close by. The hotel room was very clean. Nice suite! We were very pleased with the cleanliness. It's 1.5 miles away from NIH. 10 minutes away at 6:00am with very little traffic. The pool with a lifeguard made our stay even more enjoyable. The bar and restaurant looked very nice. Also, there's a mall up the street that is nice to shop and grab a bite to eat unlike downtown Bethesda. There's a parking garage with a enclosed walkway to the hotel. Would definitely stay here again! Thank You Marriott!