I always try to buy my tuning parts from dotshop Italy. The guy there, Mattia is really good and always communicates / responds to emails.
I've ordered the module from him. He told me the problem, although it didn't put me off at all.
Here's what he told me. He said the module works very well and the increase in bhp / power is very good. However if the car is full of people and there is a hill the car will slow a little. They developed a new map which is an improvement but they still do not consider it perfect in this scenario but conclude that it's just a limitation of the engine.
Actually, it's not really surprising that the little motor slows a little when full of folk going up a hill
Can't wait for mine to arrive.
Just for reference it says it a '111' version on the paperwork I received.
Hope this helps