I am new to stump grinding and have some questions.

[TheJollyLogger]

I think there is a fundamental reason that system hasn't taken over the market. It looks good on video, but I'd prefer to see what that tool looks like after 10 years of use.

Stump grinders have replaceable teeth. That machine doesn't, and it comes with a mighty hefty initial investment, too.

I'm having a hard time seeing how well it would chase roots

 

[GusGus2020]

I'm having a hard time seeing how well it would chase roots

It’s like I mentioned in the other post - it doesn’t have all the flexibility of a traditional stump grinder, but if you’re worried about flying teeth, lots of dust and other debris all over the place, and toxic dust (mentioned by someone else), this might be a viable option, particularly if you already have access to a skid steer and are reasonably good at welding (to fix the relatively simple auger).

Another tool to consider that some people may not have otherwise known about…

 

[pdqdl]

I'm having a hard time seeing how well it would chase roots

Brute force. Big mess.