I also have the ULA Amigo Pro and love it! No pumping (which was putting my back into spasms bent over the water source) and definitely lighter than most pump filters.

The one improvement I'd like to see on it is a shaped water "bucket" of silnylon instead of the round piece of silnylon with drawstrings. The former would be much easier for dipping the water out of the stream. It would also be easier for those locations (such as most lakeshores) where you have to fill the "bucket" by dipping water out with a pot and pouring it in. Of course, making the shaped "bucket" would cost more.