You need to really research them. Don't waste your money on something like Jack LaLanne's. Even the reviews on Epinions.com would tell you that it's crap. It's also not just about whether or not a juicer can juice, some heat up too much which can kill a lot of the enzymes and nutrients in the juice. What kind of juicer you get also depends on what you want to juice. If you mostly want to juice fruit, citrus, green veggies, etc. How much time and patience you have for cleaning. The ones that extract the most nutrietns can also be a pain to clean.