We have two. An 18 and 21 Forrester. The 21 certainly has more plastic than the 18, plus the 21 has that annoying thing where the engine shuts off at idle. It can be overridden but you have to remember to do it every time you start the car Bugs the crap out of me. There are also some things I like better on the 21, but can't recall off the top of my head.. Taken the 18 off road a few times, nothing serious, but never any issues. If you're not rushed for time, I'd look for a low mileage used one.