Although the area around Seton Hall is a bit "iffy" I never felt unsafe walking with my husband through the beautiful rose garden each day. The hospital security is very attentive and I never once felt unprotected. Obviously we never considered walking outside after dark, but the well lighted tunnel/hallway between Seton Hall and St. Vincent's was an efficient/safe way to go back and forth when needed.
My surgery was in May, 2011 so when I was wheeled by the "wall of windows" I had a lovely, calming view of the blooming wisteria (gorgeous purple flowers).
We guessed wrong on the weather. We were there the first two weeks in May and wore our jackets outdoors the entire time.
Check the Weather Channel for the 10-day forecast just before leaving for a better idea on temps.
On Day 9, some friends came to pick us up and it was a short drive to downtown LA, where there was much to see ..... Union Station, Staple Center, Disney Concert Hall, etc. Also Griffith Park and Observatory is a short drive, but well worth the view (we did this before surgery). If you are up for it, some of the game shows are nearby in Burbank. Just some ideas ..... obviously there are many things to do in LA!!
If Seton Hall is finished with their renovations, amenities may be a bit different, but when we were there it was a very basic, very clean, and very quiet hotel accommodation. I took my own soap and shampoo from home. There is a small gift shop in the hospital and a small pharmacy in the House Clinic across the street that have a few "forgotten" items ..... such as a shower cap (that I did not even think to bring from home).
Many thoughts. Clarice