There is no doubt that Chateau de Berne is a special place that is exceptionally beautiful. We enjoyed an excellent wine tasting (being ex-trade this was important to us) and a warm welcome. The shop is also excellent, selling delicious nougat and other titbits - all at a reassuringly punchy price!We booked lunch in Le Bistrot by email. The booking was taken, but no acknowledgement on line was given in advance. So we chanced it and turned up. The service was slow - although our waitress was friendly and skilled - it was simply a case of too many customers and not enough staff. This meant it took too long to order, although after we did, the food arrived quickly soon after. Our two small children had fish. Very plain and carelessly presented. Nothing green in sight. This pleased my older son as colour was added via extra ketchup. My wife's hot goats cheese salad was brilliantly presented and absolutely delicious.I ordered Boeff Tartare - an all time favourite of mine. I was salivating. This was going to be great! Sadly, the reality fell short of greatness....by some margin. Under seasoned. Some awful sweet ingredient in it that I couldn't identify (I could only assume a gleeful strawberry had escaped from the fridge and hopped in behind the chef's back or something). Essentially a poor example of steak tartare - I've had better served on trays in Italian ski resorts!! Sadly, we didn't get to try desserts as my 2 year old decided to lift proceedings by filling his nappy - much to our delight.At the outset of lunch, when we asked for a child seat, we were informed 'they are all in use or reserved'. To be fair they did then give my two year old a cushion. What was particularly irritating though was to see two child seats sit unused for the entire hour and a half we were there. Reservations or otherwise, this raised our blood pressure.At the end of proceedings, when I finally got to pay my bill (there was a bit of wait for this), I raised my views on the potential for the steak tartare to be entered into a local 'canine cuisine competition' (well, almost). The staff were very upset that it wasn't right and offered to take it off my bill and when I refused this, even offered me a glass of wine (I said no). On the above point, I felt it unfair not to pay because it essentially came down to my palate and subjective view. Overall, Chateau de Berne is definitely worth a visit. However, if you have a two year old with you ensure you reserve a child seat ahead (and if you do, make sure you turn up and use it) and take some spare clothes in case they decide to produce an unexpected poo the size of a small Christmas pudding.