There were several challenges. The new fence had to be adhered to a concrete block wall, in many places it had to be placed behind existing eugenia trees along the border, and there were several elevation changes to deal with as well as a section of landscaped boulders that had to be worked around. All in all, we were very happy with the results. The materials seem to be of very good quality. Sean, the owner or the company, is extremely professional and courteous. He explained every step of the process and accommodated our needs at every turn. He also did not request a deposit. We paid in full when the project was finished. The installers all seemed to know what they were doing. Sean came by throughout the installation process to supervise and help out. We had only two concerns. Because of the changes in elevation, keeping the fence true and level throughout its run was no doubt a challenge, but I think they could have done a slightly better job with the finished product. Truthfully, the deviations are slight, and I'm not sure anyone else would notice, but I know they're there. However, having lived with a shambles of a wood fence for so long, we are certainly not going to let a few small imperfections ruin our enjoyment of the new vinyl look. The second concern was that the project probably took a little longer than it had to mainly because the guys often did not start work until around 11 am. Their excuse was that they had to wait at the shop for portions of the fence to be fabricated. That may be true, and it may reflect the fact that Valencia Vinyl is not as big an operation as some other places. Balanced against this issue was a price that was significantly better than the competitors, great customer service, and a very nice finished product. We would definitely recommend Sean and Valencia Vinyl to others.