I have one myself collecting dust in the corner. I didn't so much mind it in the beginning but when I tore my rotator cuff and also my bicep this was very painful using. Not only that because it is a machine, even though I have to put weight plates on mine, I had to put quite a bit of weight on it to make it useful. Unfortunately the most I could fit on mine was 450 lbs which makes you puff your chest thinking you can move all of that weight but in actually fact I am no where near this amount in an actual bench press, though one can dream because that is all it would be.
I agree with Cord, there are much better exercises that can be done but in the gym this is used quite a bit by people. Just like mine would appear you can move a lot of weight, I love being told by so many people how much they can bench when they aren't even benching but using the Pec-Deck.
"IF I COME ... I'M BRINGING THE PAIN WITH ME"