We loved Betty's place! The location is PERFECT and we felt very comfortable. Betty herself is very kind, quick to respond and clearly wants her guests to enjoy themselves.
The only things I would be aware of are the following:
1) You do have to walk up 5 flights of stairs (no elevator) with some sections turning very narrow/steep.
2) The bathroom is TINY. There is limited area to move in the shower and your knees may hit the wall when you sit on the toilet.
Other than that, the apartment is clean, quiet, and again in an amazing location. Thank you, Betty!