STL files are commonly used, but working with these files is different than working with typical CAD geometry. Cimatron has some new tools that make handling STL files easier, which you might want to ask your salesperson about. While these files import as a large mesh of triangle data, the new tools allow you to check the part for closure and even fill in gaps automatically. You can also treat the STL part as a true solid model that you can cut, merge, and divide. Having these functions available greatly expands the options for modeling on the imported data.