The new Diamond on Eighth in Sunset Park, which replaces Jade Plaza, hasn't raised the bar for dim sum, based on my visits today and this past Monday. (Jade Plaza closed after it was accused by the Brooklyn DA of tax evasion; see link below.)
Basic dishes were just eh. The chicken feet and "white" tripe were underseasoned. The beef "rib tips" were tough with huge bones and they had an insane amount of black pepper. A tablemate had only a bit of her congee. At least portions were big, especially with the beef-filled noodles and a minced-shrimp dish.
There was better luck with some special dishes: tender salt-baked squid "legs," great small salt-baked dried anchovies that were surprisingly unsalty inside; dumplings with mixed meat and seafood in little bowls of light broth.
The sauce that came with the dumplings -- a sweet, vinegary red sauce with slivers of pickled radish -- was also good on the squid. A generous bowl of ginger sauce, which Chowhound taught me to ask for at any Chinese eatery, doubled the pleasure of the beef noodle and tripe dishes.
The only dish I had zero interest in was a big rolled noodle filled with crispy, chewy dough. My ordering mistake. I'd thought the cart lady had said "five," as in five kinds of meat and/or shellfish. It was big enough for that. She'd said "fried!"
Diamond on Eighth is on Eighth Ave. between 60th and 61st Sts., near the Ninth Ave. N subway stop. I walked up Eighth Ave. a bit and marveled at the shellfish at the Sea Town Market on the corner of 58th St. I've never seen crabs hop around that much, and some small cockle-like clams were so fresh they were actually twitching on their big styrofoam bed of ice.