I first trialed Syncfusion Essential PDF in 2009. I have found excellent for my needs. It has a broad feature set, reasonable pricing, good license terms and it is well supported. I also use the DocIO and XLSIO which enables easy deployment of Word and Excel templates. With the very wide number of object types and layout options that Word supports I have found that on 2 occasions things have not worked exactly as I expected. Each time the Syncfusion support team resolved the issues.