Tom is wrong. The two trolley lines in Drexel Hill were not part of the P&W. The P&W is the current Route 100 running from 69th St. to Norristown. The lines through Drexel Hill were part of the Red Arrow Lines and are now the Route 101 from 69th to Media and Route 102 from 69th to Sharon Hill. Both offer convenient and quick access to Center City. Additionally, Upper Darby is served by commuter rail stops along Septa's R-3 Media/Elwyn Regional Rail line.
My wifes family live in Drexel hill, my wife used to take the trolly into center city when she was thirteen. We have not heard of any bad situation on this line. I take my children on the trolly frequently.
You can get the trolly from Drexel hill to 69th street and change to the L for center city, or other good areas that are easy for a commute are Upper Darby, Narberth, Ardmore, Wynwood. These areas use the R5/R6 which is straight to center city.
Take a look at my wesite for home in these areas, i can highly recommend Drexel Hill as my wife and her family have been happy there for 30 years!