I don't think there is much comparison with the Steampro and the Storm, as the later is in a different league. When i first started I looked at the Prochem range and then opted for the Airflex Pro which i was very happy with. I now have the Storm which I have had since March and am very happy with, very powerful, not had any reliability problems but Matt at Cleansmart is always very helpful when ever i have had contact with him. Like others have said you can just order the parts direct from Cleansmart.