Can anyone recommend a good steam cleaner for my carpets?

I have 3 children and a ’somewhat’ house trained puppy. My carpets are a mess. I am looking for one that heats the water and has a stair attachment. I have read good and bad about the bissel proheat model and I really don’t know of another brand to look at. Modest priced, please. What should I look for and what should I avoid? Thanks.

Marietta Carpet