Colleague
General comments on this forum suggest that the Sebo DUO is satisfactory for pre-spray agitation, but not as good as the heavier Envirodri machine. But bearing in mind that the warranties of either don't cover use as a 'wet' agitator, I reckon the much cheaper DUO would be finacially wiser. However if the proper Dry Clean capability is desired, then from what I've witnessed of the Envirodri, you can't get better (in view of the limitations of course). Oh, I forgot to mention, I use an 18" carpet brush for agitation since: 1. YOU control the force, and 2. The exercise feature is HEALTHY !
Best regards
Pete (JS2)