I had my 2nd training session today and my trainer told me she prefers using medicine balls, body bars, etc. as opposed to traditional weight machines. She finds them more effective b/c of the 'greater range of motion'.
In the gym here in CA, space is limited so it's hard to spread out and use all the implements you need on the gym floor. It'st just a lot easier to use the traditional weights.
At my gym in DC it's much easier to set up shop somewhere so I might try those strength excercises out later.