Just my two cents...
I've used this in the past and it works great! Just to clarify for you though, it is not a standard master sp and needs to be added (as mentioned in a previous post).
Also the caveat here for us was that we would create the file dump to a folder that SQL would have access to and then attach the file using the full path and file name. There seemed to be no real difference from using the standard sendmail to the send_dbmail by only one parameter.