The lighting in these shots is really good. I agree that light is a major challenge in interior shots, but this works great.
As far as lining up everything, thanks to the magic of Photoshop you can get all the verticals straight and even if you have a little barrel distortion you can fix that, too. The wider the angle of your lens in these small confines, the better. The trick is to make sure your camera is level and it will help to eliminate much of the distortion.
The trick to good photography is to learn where to point your camera and when to push the shutter. The EYE is more important than all the technical stuff.