The juicer is good at extracting the 'juice' out of the fruit. The juice is mostly going to contain sugar and water soluble nutrients. There is a lot of beneficial stuff left over in the pulp. Some people say that juicing separates the good stuff from the sugar (what you drink). So while juicers make juice that is better than what most people consume (store purchased sugar water) - it's not as good as consuming the whole fruit.
For those that want to drink fruit juice, I recommend grating fruits and vegetables into a blender. It doesn't over work the blender to get a smoother consistency, you are consuming the whole fruit/vegetable and it doesn't take a bag of apples to make a glass.