L.O.
I had a Bissell Quick Steam, purchased at the same time as a friend. She's already on her third one as she won't quit using Vinegar solution in it, as it's cheaper. Inspecting them, the only thing wrong was the seals were all dissolved and crumbled from the high acidity.
Walmart makes a Bissell safe cleaner for them that way cheaper and cleans just as well. For odor elimination, there is an orange based cleaner, and an allergen cleaner that are both awesome. The only thing that I buy that is Bissell Brand is their spot cleaner/pretreater, as it really tears through stains without stinking up the house and ruining the carpet.
Hope this helps.