I found the filters got blocked very quickly, so having to remove and clean the filters was time consuming, plus having to change the water as well. I really can't see any benefit in using a recovered water system over the normal fresh water system unless water is hard to get hold of.
Why would you want to use dirty recovered water that may have picked up contaminaton from one part of the carpet and deposit it through an uncontaminated area of carpet. I know you can use an anti microbial in the tank but why add to a carpet unnecessarily. Although it's only my opinion, I don't agree with the fact that a clear water rinse would leave as much soil in the carpet as a recycled water machine. I would rather encap and bonnet absorb the majority of soiling.