This is the only one I have shot with the ports. To be honest, I don't notice them when shooting; I do think they help marginally with muzzle flip.
Now standing behind someone and watching is a riot though, a large amount of flame shoots out of the ports with every shot.
I have never shot it at night, but I suspect it would dazzle you and ruin you night vision.
I bought it because I wanted to try a ported gun, and it seemed pretty slick, Springfield makes the same size 1911 now but I think they dropped the V10 model of it. I had to send it back to Springfield right after I got it, needed a new slide release, barrel link, and extractor. Yes it was brand new. Springfield to their credit was a joy to work with, paid for everything and it works pretty well now.
I would buy another ported gun if I found one that interested me, but my next purchase is going to either be a fullsize kimber, or Ruger 44 mage, or get a slide and frame kit and build my own 1911.