inlines are nice but not sure how easy it is to drain vs unscrewing the bowl in the other designs.

 

i like the clear look

http://www.ebay.com/itm/Air-Oil-Separator-Mod-Car-Truck-Engine-Intake-Clean-Clear-PCV-MPG-FJ80-Auto-/252038410509?hash=item3aaea8f10d&vxp=mtr

 

thats a nice one..i believe the key is the brass (or a media) that condenses the oil from the vapor.. the cheap ebay "can" types i dont believe have them.

the one you linked looks like this one from harbor freight
Mini Air Line Filter