About two years ago I bought a Hoover Spin-Scrub from a local vac dealer. I was one of the last Ohio made models, however, I would have had no problem what-so-ever purchasing a Rug Doctor.
In fact when I went to the Vac shop the Rug Doctor was on my list. I just couldn't justify the $600 or so for a machine that I use maybe every 3-4 months. Even with my brother and I sharing it as we had planned, it was an expense.
I have an older Big Green Clean Machine, one of the old cans that is straight suction that has served me well. I looked at the Royal and liked it well enough, was steered strongly away from the Bissel Pro-heat as troublesome and expensive to repair. But in the end I opted for the Hoover and have no regrets. Ok one regret, I wish the tanks were bigger. I know if they were bigger it would weigh more, but I wouldn't have to fill and empty so often.