I've been using The Lightning Dock for months and I absolutely love it. The cable locks firmly in place once installed. It's excellent. Yes, it requires two hands to remove the iPhone when docked, but that's because Apple's lightning cable really holds firm. Keep in mind that The Lightning Dock uses your lightning cable.
I only have one complaint. It has a back-rest that I've never installed because, in order to use it, you have to use a very slim iPhone case (or no case at all).
The problem is that most slim iPhone 5 cases don't cover the bottom and top edge along the front of the phone (see image below - ignore the stupid graphic that shows the iPhone changing from black to white). I hate cases that cover all four side edges of the back of the iPhone, but not along the front, and that bugs me.
Here's another example of what I don't want. I clicked the orange version to make it easier to see. Notice how the orange lip doesn't go across the top and bottom of the front of the phone?
Can you recommend a slim case that doesn't leave the top and bottom edges along the front exposed? A slim black case?