Here is our Breville Juice Fountain Plus juicer- for almost a month now I have been using it and I couldn't be happier with it! I use it almost every morning to make juice for my kids and myself, and on Friday nights I juice a pineapple so Mr. Mother of Style and I can have a TGIF Mai Tai :).
For the kids it is pretty much just fruit juice that they want to drink- apple, strawberry, pineapple, lime, pear and orange in various combos. After I make their juice I add kale to mine (and sometimes beets, carrots or cucumber). One of my favorite combinations is pineapple, kale and lime.
Preparing the produce for juicing is pretty easy. Cut the rind of off citrus and pineapple and everything can just go straight into the juice without any extra steps besides cutting it into quarters in order to make it fit into the chute. Less successful fruits have been blueberries and raspberries. Raspberries were the worst because they just end up being sprayed back up towards the chute instead of going into the pitcher as juice. I reserve raspberries for smoothies in a blender ever since that unfortunate juicing experiment!
As far as vegetables go, the only recommendation I have is about kale: I had better results with baby kale leaves than with the curly pieces that are sold specifically for juicing. The curly pieces just ended up shredded and stuck to the top of the shield, same as the raspberries. This doesn't happen with the leaves.
Clean up is pretty easy and pain-free. First step, before you juice, line the pulp catcher with a plastic produce bag- when you are finished just lift the bag out. You can either use the pulp in baking or toss it/compost it. The most important thing is to not let the dirty juicer sit for more than maybe half an hour- if you clean it promptly you can rinse all the parts in 2 minutes and set it on a towel on the counter to air dry.