Surprisingly Very Good!
This salad was wonderful! My husband and I absolutely loved it. We loved the texture of the walnuts and the flavor of the feta and blue berries. The dressing was amazing! Great flavors all around. We were worried we would still be hungry but we weren't! Changes I made: based on the reviews of others, I only added 1 tbsp of vinegar (I used a pomegranate flavored balsamic), I used a container of blue berries in fruit juice, as blue berries aren't in season, and drained the fruit juice - it was about .75 cents at the grocery store. I didn't have any shallots, so I used 1 white boiler onion.
I highly recommend this recipe, especially if you like spinach. I thought the 1 tbsp of vinegar was just fine, nothing about the recipe I would change.
Pros: SO EASY!