Internal Shutters are great for additional insulation to keep the heat in and cold out. They are also very good at reducing street noise.

Make sure you get a qualified company to help choose the correct configuration and then fit and hang your panels correctly. Bauhaus Blinds has that knowledge and experience. 

Shutters are the one true value adding window dressing. Bauhaus Blinds will get you the best price for that quality product with 5-15 year guarantees.