I know it's not the same site, but I purchased my Hamilton tickets through Broadway.com and had no issues. Sure, I paid a premium service fee, but it was far cheaper than resale on TM. I bought them back in June for this past Friday (after my attempts to go through TM post-Tony's failed and the tickets were lost from my cart). I was nervous leading up to the performance, but I showed up about 45 minutes prior to curtain and there they were, waiting in an envelope at Will Call. I can at least vouch for them, but otherwise I've only ever gone through TM or Telecharge.
"If you start from a place of joy and charm, you can get away with a lot in the second act. It may be that that's my life. I'm not sure."
~Roger Bart