Due to space restraints at home, I have had to get a set of free weights to take the place of the machines that I use when I am at the gym. It seems to be a nice balance. I have noticed that by varying the two types of weights, I am definitely seeing a little additional definition in my arms especially. Sometimes, I know that our bodies get to use to things, so it might have been time to change things up a bit. I have never used a lot of free weights because to be honest, I felt like I was getting a better workout on the machines, but I now think that I need to do both. It works out because when I am at the gym working, I can workout as long as it is slow or before/after shifts and the last place I want to go on my days off is the gym so I sue the free weights. I highly advise if you are looking to tweak your workout a little, invest in a few free weights for your time at home. It will make a difference.