Great stain, be liberal with application - This product worked very well and I really like the color. It did turn out a little more on the tan side in lighter applied areas, but ended up overall looking very nice.
As a first time acid stainer I learned a number of things. Prep is very important, take the time to do it right. Most importantly, is to make sure you are getting complete coverage when you are spraying the acid. You will note that there is some foaming immediately on contact which goes away quickly. This appears to be the time when the majority of the color transition takes place. As you brush in the liquid it still colors the concrete however not as deep as where the direct spray contact is made. I needed to be more generous with the initial spraying to make sure I had complete coverage. As a result, the appearance is a bit mottled and splotchy. Even with the incomplete coverage the floor looks significantly better than the bare concrete. Fortunately, I picked a room I built in my pole barn for my first try, but will be doing my basement and porch shortly.