"It has the spec sheet of a $400 grinder for a fraction of the price, making it a high-reward, high-risk proposition."
The '64mm flat burrs' are large, flat cutting disks designed to produce more uniformly sized coffee particles than the conical burrs in most entry-level grinders, which can lead to cleaner, less muddy flavors in your coffee.
This is for the home barista on a strict budget who understands specifications and is willing to accept the risk of an unproven brand to get pro-level features. It's a gamble on getting 90% of a premium grinder's performance for 40% of the price. The ideal buyer is comfortable with potential troubleshooting.
Anyone who values proven reliability, customer support, and a predictable user experience should look elsewhere. If you want a grinder that is guaranteed to work well for years with available parts and service, an established brand like Baratza is the more conservative choice despite the weaker on-paper specs for the price.