How good is the artificial spray on skin ?

An interesting item to include in a first-aid kit is the spray-on-skin. It basically produces a transparent layer of 'skin' that would protect your wound. But is it really as good as it seems? Should you use this to replace plasters or bandages?

Here is some points based on my experience.

Positive:
- Its easy to apply (sometimes plasters wont get a wound because its just a little too big)
- Its pretty much water-proof. Once applied, you don't have to worry about the wound being exposed to water

Negative:
- Once applied, it cannot be replaced or removed
- It does not let moisture out
- The blood cannot coagulate, hence does not heal 'naturally'
- The skin restricts movement, if applied to joints

So there are pro and cons of using the artificial skin spray on and whether to include it as part of a first aid kit depends on the first aider and what he is comfortable with using.