This is a fantastic location. We walked everywhere in Rome from here within 10-15 minutes, including Vatican City. Piazza Novona is only five minutes away and a great spot to sit and people watch.
The local shops are a bit touristy but the market vibe is wonderful and there are countless areas to stop for coffee and restaurants (I recommend Forno Campo de 'Fiori for a quick and delicious take-away lunch).
The dryer is part of a combined washer/dryer machine and we couldn't figure it out, so plan on only using it if necessary.
The location is safe and gated and the night life is vibrant.
If you are looking for an authentic experience in the heart of Rome I highly recommend staying here!