I agree, they have been safe. I have never had a problem with the pin falling out. The dumbells are a little awkward at first but then they become as natrual as any other DB. I have used them in a variety of angles and the pin stayed locked in place. A good buy for you, you had an excellent quote on price.
They are new. I haven't bought them yet. I'll pick them up on monday. Fitness Resource (they are in several east coast states) has them at the same price but without the 15% discount. I'm getting them at a local store. You can order them from www.powerblock.com but they will cost a little more.