I have yet to find an example of a good quality coffee that could not be pulled with great results on the Linea Mini in the last three years.
Including some very unusual roasts, like Chromatic's "Radio" espresso, on the extreme light end of the spectrum.
Most recently, have pulled Dragonfly Leam Hammer and Gotham Degrees North (many threads on these two on H-B) and both are stellar. My reviews of the coffee are up. Also, I've reviewed most of LaMarzocco's Home Subscription, which feature a different roaster every month, in the coffee section of this forum.
I'm not saying lots of dials and gizmos are a bad thing, but not having them hasn't been limiting in the slightest.
Once dialed in, the Linea Mini is very stable and repeatable. I get rewarded to the same great shot over and over.