Not bad. A service station to ask people, and a lot of cars going through. Not a lot stop though, but it might be because of Greece, not because of the spot
I always take this spot to go to Yverdon/Lausanne or further (Geneva or France). There is not as many cars as you would imagine, but at some point people stop, and there is plenty of room for them to stop :)
This is a very good spot I take all the time when I need to go from Boudry to la Chaux-de-Fonds or Biel/Bienne or further. Cars have a lot of space to stop and they don't come too fast :). We were once 4 with big bags and we travel toward Ticino !