The software has enabled me to use my own programs for many years, which provides great flexibility when it comes time to modify calculations or add new ones! It also helps with data manipulation of other models (that I have not even used) without having knowledge about them in order to save valuable computing power!! As far as problems go - well there are some that they do solve but others you still need manual intervention because their algorithms don't work quite so perfectly yet again saving computer resources.
! For now we can only hope this will be solved soon enough. This program allows us to make quick changes/modifications easily instead of starting from scratch using another model making our lives much easier sometimes especially during crunch times where speed counts more than accuracy at certain points :).