This place is by far the best out of the three purely vegetarian Restaurants in Jinan!
I've been going there at least twice a month in the last half year and pretty much every dish is amazing! I highly recommend the mushroom dishes and the "beef" strips.
Also the Wulong-Tea is definitely worth the 20Kuai per pot.
The interior is nice and payed much more attention by the owners than most other places. The dishes are between 20 and 40 kuai which is normal everywhere else. At the end you often even get a little present, like a buddhist wrist band or a bag of tea, etc.
Its true the place hard to find - the best way is to go to "Fo Shan Jie" by taxi and have the taxi driver call the restaurant on your phone to get directions.
Definitely worth a visit, though you might have to call ahead and book a table.
Cons: you might need to book a table via phone