David,
I agree, the comments are worthless and uncalled for, it seems to me the extracta machines do get a bit of stick off some. But they are very reliable, they work, they clean carpets and they are also very easy to fill, they are also supplied and backed up by a very successful, established and helpful company. I bought a new excel about six months ago off Brian and I do not regret it in any way, I had a wide choice of machines, altec, airflex, ninja etc etc... but my decision was made on extracta's financial standing, security and history. They do what they say on the tin, and the company will and should be trading for many many years to come.
Imo, if it aint broke dont fix it

but maybe a 3 vac machine is in the pipeline at extracta, who knows?
regards,
Paul