I found 1 good use for the Smith machine...
I have big flexibility issues when I clean. So what I've been doing lately is locking the Smith machine bar just under chin height and grabbing it where I would if I was cleaning the weight from the floor. Then I "catch" the bar so to speak, and push my elbows out under the resistance of the locked bar. Essentially trying to push my body into the correct position.
The first time I did this I was AMAZED at how tight my shoulders and wrists were.
Try it...maybe it'll help