STEPSTER: how many use it and are you aware of any particular problems

Hi,

I'm interested in how many people might be using Kevin Carroll's STEPSTER
(or SUPER STEPPER).

I'm also interested in actual user's impressions of any particular
shortcomings or problem areas experienced with STEPSTER.

I am not particularly interested in comparisons to other CNC software
packages, although if you are aware of free, open sourced software (other
than EMC) you might mention that.

The purpose for these questions is as follows: I'm considering using
STEPSTER code as a basis of an embedded 3-axis stepper controller whose
programming interface is G-Codes sufficient to process Gerber and Excellon
files. Before I would embark on this project, I thought I'd see if there
were any operational problems I should be aware of that might be "fixable"
in the porting of the code.

Daniel