Despite my worries i never had any problem with it, or charging fee problems. I like it for very fast payment, so the seller instantly saw that i paid, and i will often have the product the next day, or a day after.
It is also great for buying all kind of things abroad with no problems, e.g. via eBay. I think it is very practical, which again this is why they will at some point tighten the thumb screws, and charge so much it will become a real pita
So much for my optimism ..
