These UpDown controls (as well as the other controls i already used) are realy great! In my opinion its a good idea to split the NumericUpDown into these specialisations.
Concerning the watermark feature (which is good) I wasn't able to display the DefaultValue by default.
The values are bound to a ViewModel which provided (when the IntegerUpDown initialized and loaded) for MyMinimum=1 and MyDefault=2. However, the IntegerUpDown (Watermark) displayed always 0 by default. I don't know wheter this is a
bug or I used it in a wrong kind. Anyway this is not a big issue for me.