I had to do a lot of pharmacological analysis and we bought Microcal
Origin...I struggled so much with the curvefitter that I eventually gave up
and started looking for another program....and then I found that GraphPad
had a working demo available...and I have used that to finalize my paper...I
like it..It is simple and intuitive and I am especially fond of the tables
and reports that is returned for each fit...
Its a good program and I can only give it my warmest recommendation..