I’ve got drywall taped, coated, and sanded.  The way the windows are in these rooms, the light shines right along the ceiling so I was planning on skim-coating everything for a level 5 finish so the different textures don’t photograph through the paint.  Then I found this primer:  Benjamin Moore Ultra Spec Prep Coat Hi-Build Latex Interior Primer 580.  Here’s the data sheet:  https://media.benjaminmoore.com/WebServices/prod/assets/production/datasheets/TDS_0580/20180802%20580%20TDS%20US%20OKF.pdf. 

This claims to do what the skim coat would do, it can be applied with a roller, and they actually sell it around here.  But I can’t find anything about it other than that it exists.  No mention on he web, not even a youtube plug from the manufacturer.  Anyone have experience with this stuff?  Is it effective at equalizing wall texture?  Does it work well if you roller it on or do you have to spray it?  Would be great to skip the skim coat step but sounds too good to be true.