What is the difference between traditional window foil and Squid?

Traditional plastic foil lets some light through, but isn't see-through. So you can't look through it to see outside like you can with Squid. Plastic foil also has a rather cold appearance, whereas Squid will make your home feel more appealing.

Squid is also easier to install more precisely. If necessary, you can pull Squid away from your window and simply start again.