Excellent, top-notch work. I had bought a slightly small dress off the rack and was told by the person who sold it that there was plenty of fabric to let it out to fit me better, but when I took it to Eltsa, they let me know that I had been mis...led - while a bit of fabric was available in the seams, it would be impossible to let it out to be a truly comfortable fit without risking burst seams. Still, they helped let it out as much as possible, incorporated some ribbing to make the bodice smoother, and did an excellent job with hemming and adding a belt. They also worked quickly and were easy to visit after work, which was helpful for my schedule.
I wish the services had been a bit more transparent up front; I got very little information up front about cost or process of tailoring (I came in for 4 fittings total - each new fitting was a bit of a surprise). However, having never done a tailoring process before, it was a relief to be in the hands of talented experts who seemed both capable and enthusiastic about helping me make the most of my dress. Definitely would recommend.