Lanner WITNESS is easy to use and to learn. It is very flexible and has a great range of functionality. It is able to handle a wide variety of processes. The documentation is generally good. I have had to use it for a large project and it has been a very good experience. I have had to use it on a number of occasions and it has always been easy to pick up and use. I have used it for a variety of projects, including a large project involving a large number of people. I have used it for a number of smaller projects too. I have found it to be a very good tool for modelling processes. It is a very good tool for experimentation too.