To PEAK or not to PEAK

[Tzury Bar Yochay]

I am about to start a large-scale enterprise project next month (I
insist on using Python instead Java and .NET and I am sure `they` will
thank me eventually).

I was wondering around making my components-and-libraries-shopping-
list and came across PEAK.
My paranoia is that PEAK would make me write my application in PEAK
instead of Python
(I felt that in the past with Django).

Therefore, I would like to hear the voices of you which have any
experience with PEAK.
Whether you are using it or used it in the past or tried to use it and
abandoned it.

How happy were you while using it?
How simple it is to use?