Don't overlook the pricing fact that you have to pay even more if you want other than basic operation of the mod.
It states in QuickTour that you have to Pay Extra to Unlock the functionality contained in the unit. So it would be: The price of the unit, plus more to unlock the wattage feature, and other features that the unit all ready has Locked Up Inside.
This is a copy and paste of part of that section:
There are many reasons why we went modular with the MiD, but a few of the more important ones are:
We wanted our customers to only pay for what they use, rather than sell the MiD series with a lot of functions that some customers won't be needing. This way, we let the customers themselves decide.
Through the use of modules it is possible to always add new functionality to the MiD series
Through the use of modules it is possible for us to have the community interact with us, and suggest modules they want us to make for them
So basically, modules are there for you to explore – and buy – if you want the functionality they add.