I've been using the Motorguards (Frantz competitor) on many vehicles over the years and they work great. Oil analysis reports have showed stelar results in everything from my old Mopars to a 2.7 on up to a Cummins diesel. The modern full flow oil filter was an invention of convenience and cost saving. The best ones don't filter much below 15um, and most run arounf 30um, which translates to increased engine wear. Yes, the TP rolls can be messy to replace, but with a little practice and know-how it's not that bad of a job. Bypass filtration will extend the useful life of an engine - not a bad idea in a car you intend to keep for awhile, or a truck you expect to put alot of miles on.