As prices go these days, the flat tops are not cheap. But they're not prohibitive either. And they take a pretty long time to get to the point where you absolutely HAVE to change them. Plus everything you need to know about tension and gauges and the color of the ball ends is on the package.
I've been a Just Strings customer for a long time. They keep their word about fast shipping and they get it right the first time.
Maybe great for soloing on an Ac Guitar in a Fusion context !