We have the first ones... I like them. But we mostly have Cybex or whatever. Shit I haven't used a plate loaded machine in awhile, but I'm pretty sure the pulldown will take 5 or maybe 6.
I like the holes make for good handles you can get at anywhere. They are thick though. Adding them to a cable stack is a bitch, the 25's are annoying as well.
My gym added like 36 plates, but the new ones are rubber. FUCK THOSE BITCHES. They are thick as hell, and I miss the clank when the bar bounces.