When the weather changes, windows can get stress cracks. Stress cracks can occur with drastic changes in outside temperature. These can also occur when the inside of your house has a large temperature difference from the outside.
You may also notice that some windows in your home have fog or condensation between the glass. This means that the seal is broken and moisture is getting between the panes. A broken seal on a window will remove almost any energy efficiency features from the window. The solution for this issue is to replace the whole window unit.
These days vinyl windows can be customized to anything you want. The outside part of the vinyl can be customized to match the color of your home. The outside can also be capped in any accent color. Your grid pattern can also be custom created, giving the exact feel that you want. Windows should only be installed by someone who is experienced in window installations. Otherwise you could end up with the same problems with your windows that you had before, or worse.