Had this late last night – I should have had it earlier in the day because I went to sleep far later than I wanted to.
~6g of dried leaf in my gaiwan, 5 second rinse with 90C water, and successive steeps of ~5s each. The taste and colour were both very consistent from steep to steep. The tea was generally a very nice clear amber colour, and the tea was consistently smoky. No bitterness or astringency.
However, I find that when I drink shengs, I am not a huge fan of smoky flavours. I can see why others here enjoy it, but this tea was lost on me. I prefer apricot/grass/leaf flavours instead.