I don't see the good quality, it's nothing but downsides.
I asked the manufacturer's manager what sets this model apart from the GA 5030 before making a purchase.
Considering I did not get a coherent response and nobody mentioned a full-length button, I think I'll try again.
Pros
Power is instantly cut off (in theory) as the key is released, making it ideal for power users.
Cons
An extremely inconvenient ignition switch. There is no key lock and no soft start. The broken key cannot be fixed. At least I enquired at the service center about the availability of such push-to-start buttons; they advise ordering from Hong Kong and waiting.