My needs :

I need to develop an GUI application that is cross platform
the chosen solution must be the fastest to implement
it should be easy to extend

The application is just a database front-end, mainly for CRUD operations, listing, filtering, exporting, charts and graphs etc.
After reading about some solutions (Python Card, PyGUI, DABO, pygtkhelpers, kiwi, pyjamas, pure-mvc, PyQt/PySide, Wax, Tk-based frameworks, AVC, Fox etc.), I found myself interrested in two particular solutions, one of them is Camelot.
Before jumping into it, I would like to have some opinions about Camelot users vs skeptics. 
Thanks for sharing :)
Disclaimer: I am a Camelot committer.
If the question has been raised on the Programmers Stack Exchange, please link to it.
This question is kind of old, but for any reference, i'll chime in.
Camelot was and is developed for exactly the reasons you stated. It has matured a lot since this questions was asked and is about feature complete. Latest efforts have been made to use Declarative instead of Elixir. Stability and speed are strongpoints as well.
Feedback for Camelot