I recently spent a couple of nights here, and was worried that it might have been a little 'chintzy', given the pictures on the website, but I was pleasantly surprised to find a quaint old building with a nice sense of style (the building itself is from the early 1900s).
Firstly, this is an inn, not a hotel, so don't expect a member of staff to be there 24/7 to wait on you hand and foot. Having said that, I found the staff very helpful, offering to carry my bags, getting me a glass of water when I arrived (it was a hot June day!), and general politeness. The rooms are small by American standards, but of a reasonable size compared with those in European cities. Be sure to browse the welcome pack in your room, and the visitor's guide folder thing at the entrance to the inn (I can't remember what it was called exactly) which has a list of local places to eat and drink.
Unless you've got light luggage or feel up for a challenge, I'd suggest taking a taxi from Dupont Circle metro to the Taft Bridge Inn, since with it being on a bit of a hill, it can be quite a hike with a suitcase, even if its only about 10 minutes away on foot.
I felt that the inn was a little bit expensive, but considering the other DC hotels I looked at, it is probably good value for money.
Pros:
Friendly staff
Nice Breakfast
Clean and tidy
Free Wireless
Close to the metro and the Dupont Circle area (about 10 minutes walk downhill, bit longer uphill)
A living room area where guests can gather.
Cons:
Noisy/old AC (this can be worse depending on what room you stay in, I stayed in room 22 which is probably the closest to the stairwell AC, but I still managed to sleep).
Somewhat up a hill!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC