We just had lunch today at Chai gourmand and we had very pleasant afternoon. We were there with family, party of 5. Chai Gourmand offers a lunch menu (3 courses) on week days for 30 euro which is very well priced. We asked to change one course for one of us which was allowed without any problems for a very reasonable "supplement" of 5 euro.
The wine card is good and offers a good selection in quality and price. The wine we selected was quite expensive but worth the money. The service was good and at a good pace.
We really liked all the "amuse" (small side dishes served with the aperitifs, before the first dish and after the desert).
A real astronomical experience! We will go back.
The restaurant is quite busy and reservations are recommended.