Looks like it’ll be very handy for modelling and for $20nz the price is certainly right. Branded Dremel tools from Mitre10 are more than ten times that price!
This tool is battery powered with a mains charger, which is a mild hassle I’ll admit. I still can’t get past the $20nz price though. Even if it only lasts a month of modelling it’d still be a good price. At that price they’re almost disposable imho.
If you’re a New Zealand hobbyist I’d suggest checking out your local Mitre10 for one of these.