Yes, bay windows are worth it. Bay windows are formed of multiple frames with multiple panes of glass and will therefore let lots of light into your home. The internal surrounding area around the bay windows will be lit from every direction making the room appear bigger and brighter. Besides, bay windows provide curb appeal and can add a considerable amount of value to the building. The only downside to bay windows is that they may be more complex to install than a typical standard window and the many benefits will only last if the bay window has been installed correctly.