We used Valderrama Construction for our back yard after checking the jobs and references of 4 other companies. All of the jobs that we saw that Valderrama had done were beautifully done and all of the owners had very high praise for the company.
We had them rip out the existing concrete in our back yard and lay new stamped concrete all around the pool area. The finished job is nice, but dealing with the owners of the company was very difficult - we could not get calls returned and the job was delayed several times. In the end the list of imcompleted items was never finished and we will now have to repaint the back of the house where dried concrete is spattered. I would not write out the final check until I could do a walk through of the project with the owner if I were to use this company.