Note that North is to the left side of the picture. This means that most of the sun will be coming from the right side. There will be a trellis on the east (top) side.
If you consider subsequent plantings, you can see that this mere 4x4 garden can produce a lot.
The only thing I'm skeptical about is keeping the tomatoes under control. I'm using 5 foot tall cages that I'll tie together for a little extra support (the cages will be really crammed together in the first place) and I'm going to have to train them to stay in the cages as best as I can. We plan on having another box next year, so I'll probably put them along the outside like I have the peas and cucumbers. This way, they can grow outward all they want. Alternatively, I might do a long, narrow SFG box just for the tomatoes.
In addition to the above garden layout, I'm also growing baskets and pots full of strawberries and already have two full-grown Red Robin Tomato plants hanging on the front porch. I will also most likely grow the spare cherry tomato seedling I have in a large pot on the front porch. These babies are Super Sweet 100s, so I'm really hoping to be overwhelmed by bowls a bowls of cherry tomatoes! Especially since Brandywines take a while to fruit and aren't known for being especially prolific.