Pom is absolutely amazing, as a seamstress and as a person. I only had to visit her 3 times to get my wedding dress altered. I didn't have that many stylistic requirements besides shortening the front hem. She found things in the dress structure that needed to be fixed (it was bought second hand) and offered do some of them for free because I didn't request/know about them. She is definitely knowledgeable in dress alterations and even period gowns.
The best way to contact Pom is via email, which she checks and responds to very quickly. When I first called her, she asked that I email her with a photo of myself in the dress, wedding date and contact information. From the photo, she was able to give a rough estimate of how much she would charge. It really impressed me that it wasn't far off from how much I actually paid her in the end. You will be required to give her a deposit on your first visit but she was pretty relaxed about how much you can pay. Each visit is about 45 minutes and I got to see her work on some final touches on my last visit. Her prices were very reasonable and she is an extremely skilled and efficient worker.
I highly recommend her and she was definitely an enjoyable part of my wedding planning process.