I think this topic may have been mentioned before, but my question's on a bit different angle.
Ron Harris mentioned in his IF THEY HAD THE BALLS that it's OK to use machines to train instead of freeweights. I noticed that due to my lack of training partner, I tend to stop before I fail (because I dont' want the weight to fall on me!). I also believe that this has had some negative impact on my training. I do squats and deadlifts, but I'm talking about upper body (such as bench, etc.) I'm not training to be athletic or whatever. I'm training purely to be stronger and leaner. Given my concern for safety, would it matter if I used machine instead of free weights for some of my upper body movements? Or is it not worth it? (i.e. it's better to stop before going to failure on free weights than to use machines) Any thoughts, experiences, etc.?