We purchased Syncfusion Reporting to replace COM access to Office in an app that creates spreadsheets and docs. It seems to be about 20X faster versus using Office COM. Then we upgraded to the Enterprise Edition for use in an MVC app. The product performs wonderfully and has made a big improvement in the look and feel of our MVC app. The documentation is sometimes a little lacking, but that is in part to the vast number of features available. Not much of a problem, because all we have to do is post a message to their forum, and within 24 hours their support people provide the answer, usually accompanied by a sample project to illustrate the solution! Hands down the best support I have ever seen for a .Net product.