The Pan American link is the same product..... from the cost it looks like they're importing them from a UK vendor. You don't need the 1" throw ones, 0.5" is enough for almost all needs.
They're not a panacea though. I use both them and clecos and would not want to be without either. There are different situations where one or the other is more useful.
Skin pins fill a hole more completely and centre better, so generally give more precise alignment when assembling. They also allow you to set an infinitely variable level of clamping force, ranging from very loose to much tighter than a cleco can achieve. I also find that they don't beat up the finish on primed parts anywhere near as much.
On the downside, because they fill the hole more completely they are harder to get in than a cleco and there is consequently less wiggle room with parts that aren't mating well together. You will find some holes where you just can't get a skin pin to go in and need to use a cleco.
If left in a high humidity environment they do tend to acquire surface rust and thus the locking nuts become stiff on the threads. A little work with a wire brush and some oil solves it, but can be tedious with a large box of them. Learning from last winter, I now bring my boxes of skin pins into the house between work sessions during the damper months.
