This product has a wealth of functionality to build complex Excel workbooks. The object model is a bit awkward, but effective. Being a COM component adds some compatability issues when integrating into a .Net project, but nothing that can not be worked around. Tech support is horrendous. The documentation is good, but not quite complete - you may have to email tech support, which can be very trying on your patience.

This product would be great if it there was a .Net component and tech support was friendlier.