We had some great apartments last year in Italy. The one in Rome was especially lovely - view out the window of the Colosseum and under $150 Canadian a night (back when our dollar was stronger...sigh).
This year we stayed in a lovely place in Weehawken, NJ (just a room, but we could use the kitchen if we wanted and hang out in the living room or back yard). The owners were friendly, the apartment was clean (more of a three story duplex), we were one bus stop away (about 10 min) from Port Authority in NYC. And it was less than $100 USD a night even with the cleaning and airbnb fees. And the place was relatively new, super clean and free parking in front of the house. And less than 10 min to the waterfront for amazing views of NYC skyline. If we ever return to NYC and this airbnb is still avail, I'm def going back.
We have a trip in less than 2 weeks to France and I have 4 airbnb's lined up (Paris, Carcassonne, Salon de Provence and Villeneuve Loubet). We've been using airbnb since 2011 and I've been pleased with the majority of our stays - and the money we have saved over a hotel - I can just imagine. For ex...less than a 10 min walk away from the place in Weehawken is a Sheraton...where the rooms START at $260 a night! Parking another $25. So almost triple what we paid for the airbnb - and I feel happy knowing this money was going to a young professional couple to most likely help them pay their mortgage. And with our poor exchange rate on our Canadian dollar we need to save where we can. Our upcoming place in Paris (another room, not a whole apartment) is $250 for 3 nights including all fees and it looks amazing in the photos (very bright and colourful - the bathroom alone is worthy of the stay), has great reviews and is about a 10-15 min walk to Eiffel Tower! Can't wait.