I have used these on other vehicles with no problems.  Like the fact you can go a lot of miles before cleaning.  The cleaning process is a little hassle, but I just like the fact that you don't have to throw them away like the paper filters.  Do they improve mileage and or Power.  That remains a question mark for me.  If they do it is not by a lot as far As I can tell.  Not really the reason I buy K&N.