My review is late, I stayed here in October 2007 for two nights. As previously noted this hotel is a converted Holiday Inn with interior corridors. It appears some rooms have balcony sliding doors. As a Diamond, I was not upgraded to such. My room appeared to be a standard room, well-appointed, clean, good mattress, bedding, etc. The elevators were older and somewhat slow. In one incident I bumped into a staff member who apologized and explained that staff is mandated to use the stairs (presumably due to their slowness perhaps?) I was not assigned the 10 or 11th floor HHonors floors and was told there is no lounge. However, recently I learned that there is supposed to be a 24-hr "Pantry" on the 10th floor with complimentary snacks in a HHonors lounge. (Perhaps it was added after my stay or I was misled back in Oct.). The roof floor contains a workout gym and pool. The view from the pool deck is spectacular (of course the pool was closed near Halloween) but we could stoll the deck.

We loved the surrounding Bethesda neighborhood for dining and pub crawling. There is a free trolley roaming the area that was easily grabbed from the hotel's backdoor. Link: http://www.bethesdatransit.org/parking-circulator.htm

The DTree has a non-Hilton website to look over: http://www.doubletreebethesda.com/

The hotel provides an hourly shuttle to the nearby metro stations. It is also within walking distance.

I should mention, I strongly disliked the lobby of this hotel. Sometimes late at night if I awaken I like to use a lobby to read and avoid disturbing my DH. This lobby had fashionable but very uncomfortable seating, darkish lighting and wasted space on a Starbuck concession with hard little barstools. Feng-shui, phoohey-baloney. IMO I would prefer bright, safe and functional.

Diamond did receive a breakfast coupon for downstairs (full hot & cold buffet). Pretty much all of my recall.