PRK re-treatment: worth it? 13 years post first PRK.

I had PRK in 2005 at 29yrs old. The past 2 years, I have had to wear glasses for nearsightedness. Prescription is at -1.50 on both eyes. I am now considering getting a free retreatment under a lifetime plan that was offered back then. Is it worth it at my age? Would I be a good candidate? Of course, there are requirements that I must meet in order to get the free "Enhancement". Since it's technically free, and doesn't lead to their profits, is their decision to retreat, something I can trust?