At a quick glance,
Doesn't have a flush loop on the flow Restrictor, doesn't have a pressure gauge.
Both important items!
(Also unless it's always really warm, 50gpd won't produce much water, nominal production is at 24'C water temp and around 60-65psi)
Something with 10" canisters would be better as the serviceable parts are more common. Everybody sells 10" replacement filters!