There are some threads on this topic already if you want more info but they are somewhat dated. Salary is the $54-59 an hour range and hours will depend on your location. Since the pharmacy is typically not open extended hours, you will mostly likely work 35-37 hours a week unless you pickup some more shifts. That will depend on your boss and district. I can't speak for the raises as I never worked for them. Kmart/Sears do not offer 401k matching which surprised me. I also know they cut tech hours to zero this year in low volume stores (<300 scripts a week is the cut off). They still use PDX, so it takes time to process scripts. They are closed on holidays. Some pharmacies are closed on Sundays too. As far as job security, supposedly they stopped downsizing and closing down shops.
If you are seriously considering them and never worked there before, just go into a store and observe for 10-15 mins.