It provides me with an easy way to create very simple models in R and then export them as C code for use in other languages. I can't think of anything that I dislike about this software. It does exactly what it promises - creating very simple models in R and exporting them as C code. The documentation is also very helpful. If you are looking for a quick way to get started with modeling, facsimile is a great solution. You will be able to create very simple models quickly and easily. I have been able to use facsimile to model some very basic problems, such as queueing or routing networks.