I have created a buy together offer http://bit.ly/1PfEPRX(only Greek, sorry).
When the customer adds to cart a pop up shows both products -> http://i.imgur.com/BmrWxq7.png
But, when the customer clicks the mini-cart, the description and all the Buy Together product details are not shown http://i.imgur.com/gTW3fm2.png. I want to avoid for the customer to think that he buys an overpriced product.
Finally, the same thing happens when the customer visits the Cart Page.
After completing the order, Order Details show the secondary product.
Have a good one