Good Long Jing is very hard to find in the US. The 2010 Weng Jia Shan Long Jing is significantly better than any I've tried except for the 2009 Weng Jia Shan I purchased from Jing Tea Shop a few months ago. The two are very similar as far as flavor and aroma go, but this year's version has a noticeably thicker consistency.
When brewing this Long Jing I keep the water temperature below 185 and have achieved the best results using a very thin porcelain gaiwan. I do not recommend brewing this Long Jing in an Yixing.
When brewed as above, this is a very unique and flavorful green tea with a pleasant, mellow aroma and a clear liquor that is a nice transparent shade of green. Both the taste and aroma are natural, sweet, and pure. The 2010 Weng Jia Shan Long Jing is one of the best green teas I have ever consumed. Compared to a sample of the Shi Feng Long Jing I recently tried, the Weng Jia Shan is well worth the extra ten dollars, turning a pleasant experience into an outstanding and memorable one.
Considering how difficult it is to get good Chinese green tea in the States, I highly recommend trying at least a sample of Weng Jia Shan Long Jing AAA, if not the full 100 grams. I think the sample may lead to purchasing the full quantity, with confidence, in the future.