No idea how they compare with Origo but to my mind they are fine. I have a single burner which last time I tried it was a bit clogged corroded (after some 15years) but they are so simple easily fixed I can;t imagine any real problems. The needle valve is removed via the lock nut under the control knob Actually my problem is I never use it. More of a cold drinks person and never seem to camp on the boat much.
http;//www.whitworths.com.au
may be a source of the stoves or parts regards olewill