NAV Testability features

ta5

Hi
I had a look to the testing framework and have also read some threads and blogs on the internet.
After having a first overview on this topic, I want to ask you the following:
Does somebody use the testability feature in a larger vertical solution? If yes, can you suggest further readings and in general, what are the pitfalls and difficulties to avoid? Does it also affect the way of developing process by means of using test driven development?

Thanks in advance
Thomas

ta5

Nobody?
It seems a lot of people know about the availability of the feature, but only few use it? :?
Still, if anyone has a few hints or tricks, sharing here would be very appreciated.
Regards
Thomas