I work out alone in the mornings and I am able to do squats, tricep extensions, deadlifts, etc. without a problem b/c I don't have a spotter. However, I kinda feel uncomfortable with benching w/o a spotter. Is the machine where you sit and push out (i think it's called an isometric bench press) THAT much worse than using free weights? If so, are there any other suggestions for what I could do?