
I think bicarb is more for reducing/eliminating odours??? But I'm not sure.
I have had two Bissells and one Vax - def prefer the Bissell (first one was just small spot clean model, lasted years, very effective). The large Bissell Pro Heat Powerwash is the one I use at home now but also have a Vax in our holiday home which I only chose because it was on offer and it leaves carpets/rugs etc much damper for longer. I also prefer to use reduced diluted solution in Bissell so no tackiness left in carpets and touch dry more or less right away if house is warm, no more than an hour otherwise.
I also have a steam cleaner - I don't think they're any use for actual stain removal on carpets or soft furnishings but certainly good for hygeine purposes throughout the house on pretty much every surface :)
HTH, Teri