i use a power rack for benching, because i train at home and theres nothing else i can use.
i think its the best way to do bench if your training alone, if you have a partner you should be using a bench with bench press attachment or squat rack.
i regularly fail a bench press when im trying to increase the weight im on, and the power rack has saved me from serious harm or even death if it landed on my throat or rolled over to my neck.
mee too...always bench in a rack (if I can) if Im training alone. Its good when you know you can drop the bar and 100 odd kg aint gona cut you in half! Power Rack is maybe a more suitable name than squat rack really.