Dennis's place is generally fine for a short stay or a place to crash after a concert. The area itself was a bit sketchy, there were constantly people outside shouting or arguing. The parking was terribly inconsistent. We barely found parking the first day. The next days, we spent over 30 minutes circling the area, only to park about a mile away and walk through potentially hazardous areas. As for distance, this house is only close to the Wharf. Anything along the National Mall is a bit over a 40 minute walk, unless you're sprinting. The house itself was good and secure. The only complaint is that the shower water pressure was non-existent and took almost 10 minutes to heat up to a lukewarm level. The host was nice and answered our questions quickly- but unfortunately we will not be staying here again.