Fully functional and it's easy to install though one needs also to register at Shrink The Web and then get back to the extension.
Ease of use
After installing it is very easy to use.
I found it quite confusing to install it but I received support promptly within two hours and was able to go ahead easily.
I could not follow the documentation initially. But eventually figured out everything. A step-by-step instruction in one place would help.
Value for money
It has a very high value/price ratio and is therefore very good value for money and I am enormously happy to have bought it.