I've got an orange branching Monti, probly forest fire that hasn't colored up completely, and a Metalic blue branching Monti. Also have a green Monti cap that bleached out a few months ago. It's alive again somehow and growing again. Also have an orange encrusting Monti that has been a slow grower but hardy.
They are definitely more finicky than birds nest, stylos or Pocci but not really bad like across. Seems like once they settle in to your tank they start really growing, the only one I had issues getting settled in was the orange branching Monti. Also had a setosa almost bleach out and stop half way, it's making a strong comeback tho. Not sure what causes it but when they aren't happy they go downhill quick it seems