No issues with my '12 Legacy at 38k mi, but my daughter just bought a used Crosstrek with 50k mi, against my advice, and has a low speed vibration/shudder which feels like a CVT issue to me. It happens on acceleration,decreasing up to about 35mph where it's gone. Luckily she bought it from a Subaru dealer certified pre-owned, so it will be going back to them shortly to be checked out.