Women lifters....cybex vs. free weights

Fitwam

I've been using the cybex machines in a circuit style training...but upping weights in each set (not necessarily to fatigue but struggle on last rep).
What are your thoughts about the differences in using cybex machines or free weights?

My problem is that the gym where I have a membership is VERY limited on the squatting type of equipment etc. No smith machines (which I don't like anyway) or squat racks...but they do have some nice free weight dumbells, universal bar, etc.