I normally use Dasseti ENGAGE for surveys, and I appreciate that it's free and not complex or complicated. The initial setup was very easy, a nine out of ten.
The benefit of having a central, online database to engage with stakeholders, creating a more dynamic portal to manage due diligence information, deadlines, team accessibility and co-ordination of responses as well as the history thereof, so that information is never lost and the same questions do not need to be re-answered over and over again.