Guzzle h2o seems to be a good company but
smritte is absolutely on the money. "What I can see is they used all common parts." In my research I stumbled onto the company that manufactures the UV light used by Guzzle. And you wouldn't believe where I bought it???? lowes.com................I know right!!! I was so excited for the $200 savings.
Now I will say that my install and requirements are very different than being portable. I have a siphon pump that can pull water 1/2" deep from 50' and vertical 30'! My assumption is that the unit you are referencing is the "Stream or Overland bundle." I did buy the replacement 10" filter housing and charcoal filter from guzzle but would absolutely go generic if I build it again. The one thing Guzzle does have that I cannot find anywhere else is the "push to pex" adapter.
I know how much I like my system so I am absolutely positive that you will love yours! The UV light is a game changer! I love the confidence of "From any water source" I am thinking that I will test my systems limits and pull water from these lovely brown, gator infested Florida canals and then have the water dept test it!! only $30 for absolute confidence right??????