They have their uses. However, it takes a while to figure out what those uses are for each individual paint cos some act very differently to others. Some are good for coverage, some for shading, some for washes, etc. You have to play about with them and figure out how they fit with your style of painting too.
Once you’ve figured all that out i guess that they probably do save you time but will never get you the same results as more traditional methods. But that’s ok if you’re happy with the results you do get.
I painted these guys when contrasts first came out just to see. 100% contrast apart from the base edge. Definitely quicker than normal painting. But better? Not sure.
