I just went today, admittedly using a groupon, and they are indeed heaps and bounds better than mo's dumps. my friend notes it tastes more than just butter and as noted the skin of the dumpling is just right. standout for me would be the fried dumplings - just the right level of crispy. the chili oil was great too
the place itself is really quaint and friendly; the owner/waitress even came over to ask my chinese friend to help translate for some small talk at another table. though that might be seem as a negative to some, it had a real homely feel to it. i left a generous tip and i'm hoping they succeed as well.