The 250 lump is based on the old solid Honda CB250 motor providing excellent reliability, great exhaust note (even standard) and reasonable performance (250 standard is just uder 60 mph) but with a few tweaks can be got to up 75 MPH.
Chassis design is based around the Yamaha Blaster 200 which is still a top selling and great handling off road quad, indeed many of the accessories fit both machines eg wide A arms, Skid plates, etc
The latest version of the SMC 250 now has revese gear, essential for on road use. Most machines are also homologated (granted approval) for use by two people so your quad riding does not need to be a solitary affair.