We arrived here after a not-so-comfortable-stay in NY and were pleasantly surprised by ...well..everything!
The staff at check-in was super friendly and helpful and even called later to make sure that we liked our room. The room was very spacious, clean and well equipped. We almost regretted not to be able to stay longer than 3 nights.
The breakfast offered everything we wanted: fruit, rolls, bagels, waffles, cereals, eggs and sausages, juice, etc. Afterwards, the metro shuttle took us (every 20min) to the Crystal City Metro station from where it was very easy to start into a day of sightseeing in Washington DC.
Upon our return, we used the well equipped fitness room and the small pool to relax a bit before having dinner - there are many different restaurants available in Crystal City all accessible by shuttle (until 11PM).
On our last day, we were even able to take the shuttle bus to Reagan Airport.
All in all, I would definitely recommend staying at the Residence Inn Capital View in Arlington as it offers great value for the price you pay.
(Only two suggestions:
1. Put a shuttle bus stop sign somewhere near the metro stop so that new arrivals know where to wait for it.
2. Provide a bathrobe for Residence Inn Capital View guests...otherwise using the pool is a bit uncomfortable. Or don't offer the use of the pool to both hotels.)