I've looked at a lot of the before and after photos for the provider offering that service. I think some of them look nice. I think it might be a reasonable option for someone with a shorted midface who wants to increase tooth show by building up the teeth. I do not think it's likely to be a good option for someone who wants to have a shorter midface.
I believe that jaw surgery shorten the appearance of the midface and give good cosmetic results. For someone who is interested in addressing a specific cosmetic issue, I think it's important to get quite specific about that, and be on the same page with a provider about goals and likely outcomes.