I go there a couple times a month. Isle is like everywhere else....Malibus, etc. Nothing special.

Only thing that sucks about Portland is National is located about 5 minutes away from the airport so you have to take a shuttle bus. But, at least it's close to the freeway, so you'd probably have to drive that 5 minutes anyway. Also, ask them where to get gas on your way out, otherwise it's difficult to find a gas station near the rental car lot.

Matt