Pros and Cons: Free Weights Vs. The Machine at Best Weight Bench
Safety
With a machine, you're not going to risk dropping a dumbbell on your foot, or a barbell on your chest; however, be sure not to let children or pets near the machine while the weight stack is being lifted, or serious injury-even death--could result if/when you slam the stack back down!
Freedom
You can pretty safely work out solo; little need-if any--for a "spotter" as is...