Update:
I was misquoted on the prices by the sales rep., the cm 520a was @ $160 and the cm-520au was over $300 (US). The cm-520a has the crushing burrs or "ghost burrs" and a very consistent grind, but creates a LOT of dust along with a ton of static. At first the static seemed to be an issue, but at least it collects the powder. The grinder has a heavy top attached to a plastic base, that is a bit wobbly. Maybe all of this style have plastic bases, instead of metal? No way this grinder is going in a kitchen, because it's too messy. For grinding up a pound or two in a flash it's perfect. So does this grinder get a thumbs up or thumbs down? Undecided.....
I just got the OE Tiamo HG0096 in yesterday, ran a pound thru it, and brewed a pot of chemex this morning. The grind is pretty much what Doug commented, not very messy, and fits and looks great on the counter. I believe it's a Yang-Chia 600n grinder re-branded for Tiamo and will check that out. I think the crushing or "ghost burrs" are available for this size grinder and plan on checking that out as well. Still a good buy at the close-out price of $100 with low cost shipping charges. Is it a keeper? Better than a Baratza Maestro? Don't know yet.
The OE Tiamo grinder has a three prong grounded plug whereas the CM-520a has the two prong plug typically used in Taiwan.
Photo - CM-520A and Tiamo HG0096 (600n)