I posted a review of DPA on the Trust Radius Review site: https://www.trustradius.com/reviews/solarwinds-database-performance-analyzer-2019-01-24-22-58-35 entitled
SolarWinds DPA is a constant companion making sense of database performance. Why? because it was useful every single day, if only to tell me that all was well with my servers. And when there was trouble? then it was the first place I'd go to figure out what's going on and how to fix it. Good stuff!
I second that, I have only just started using it and this tool is amazing!