French Door has become the most popular style of refrigeration. By definition, it is a side by side with a bottom freezer.
Most people find it better as you are eye level with most of the shelves and the crisper section. It also gives you extra width in the fridge section allowing for more storage and storing the largest of platters.
You can also get extra features such as ice and water dispensers. The draw back? Often the freezer is an accessible pull out drawer but it will mean that many of your frozen foods will have to be stacked on top of each other.
Some top of the range models have multiple drawers that can have the temperature adjusted to be a fridge or freezer compartment.
Best of all they look great in any kitchen.