DailyTech noticed that Microsoft has launched a new testimonial-based advertising campaign to attack  open-source software. The software giant's ad claims using OpenOffice  can lead to bad grades, and insinuates that open source software is  unreliable and has higher support costs.

The video then  jumps to select industry sources complaining that OpenOffice increased  their support costs and was unreliable, compared to Microsoft's Office  suite.  It also complains that OpenOffice is slow, requires additional  training, has poor support for macros in its Spreadsheet software, and  features poor document conversions to-and-from word.

And the ad also targets a group that frequently makes use of OpenOffice  due to budget reasons -- students.  Tisome Nugent, a public school  teacher comments, "I've had students that have turned in files that  they've converted from OpenOffice with formatting problems that affect  their grade negatively."

One commenter even blasts "open-code" in general, while another recalls  he and his co-workers breathing a "collective sigh of relief" when his  workplace ditched OpenOffice.