This elegant walkup is no dingy, dime-a-dozen tailor shop. It’s a richly carpeted, sprawling space overlooking Newbury Street through extra-wide windows, with changing booths the size of hotel rooms. And the service? Impeccable and personal, without fail. Owner Lyudmila Sletkova treats her customers like family and sees to it that their clothes—from cut-rate to couture—are cut and sewn flawlessly. Little wonder that many of the street’s savviest shops send their customers here.