Very buggy program, performs poorly with large quantity inputs to single nodes, or large quantity inputs to multiple nodes. Appears buggy at a programming lvl or intentionally limited on model complexity and scale, either is a problem for working on large models, small scales or professionally. With little alternative other then rhino or grasshopper, which offer comprehensive though more complicated services. Real disappointment as the Sketchup alternative to rhino's grasshopper. If the developers could promise better outcomes for Vizpro and more after purchase services, would be worth investment.