Playing with tilt shift effect in Photoshop

I recently came across an article on how to mimick a tilt shift lens effect in Photoshop and thought I'd try it on a couple of my images. The instructions I followed are here. The instructions are pretty simple, but getting the look takes some trial and error. It took several attempts before I got the blur and in focus areas the way I wanted them. If you want to know more about real tilt shift lenses and what they can do, you can find more here. I didn't think my attempts were too bad for a first try. What do you think?