Seatle home with Custom 5 lite bay window (west facing). the window frame / casing is literally rotting itself out.
It was properly installed, but not holding up to real life and weather. I've had Pella windows from the 70's still in perfect condition. Marvin chose inferior casing material on a high cost window. 10 yr warranty.
Not likely to get any support from manufacturer, and have to replace. Not sure what MDF they use but rot is not because of drainage or other issues, just poor base materials.
Reason of review: Warranty issue.