For anyone who wants the # from the Chase website https://www.chase.com/card-benefits/...eserve/service ( its on the top right).

From my experience in using it, besides having a different automated system, I believe it may be the exact same concierge as the Visa Signature one.
YMMV greatly depending on what you're requesting. I requested hotels in part of Maine for a year from now and they took 72 hours to return 1 hotel that didn't even fit my criteria.