The next version v0.0.5 of matlab2tikz has just been released to the wild.
The script has undergone significant changes in large parts and can now deal with more MATLAB® plots than ever. For example, support for zplane plots and frequency response plots has been added. Also, thanks to verbose user input, a number of bugs with existing functionality has been fixed.
New command line options are:
silent(boolean, defaultfalse): be less verbose with warnings.