We had Homefix install 20-odd windows, and fit a bay window in our living room about 5 years ago.
Since day one, the bay window has leaked, soaking the sill and staining the wood badly. The window attachments have snapped, and several had to be replaced.
Every time we've tried to get someone to fix the bay window, someone has either said 'we'll call you back' and never does. Or someone comes around and sprays some foam - the last time it was : We'll need to call the manufacturer of the windows. And then nothing. 5 YEARS we've been trying to get this fixed....