Lemons and oranges should be peeled unless one wants to consume all those antifungal sprays that are sprayed on many citrus prior to storage. Even DIY home grown organic peel with no chemicals will spoil the taste just because citrus oil in peels is too strong for consumption in quantities – this is why some supermarket citrus juices have this wonderful smell combined with some bitter aftertaste. Citrus oil is good to flavour cakes and treat pimples, but not for drinking.
This juicer is worth it's value. That said I note that since it is a sintrifical force juicer it seems to make much more frof then other slow grind type juicers and the remining pulp is still wet, so not all of the juice was removed ( or more could have been removed). I do like the eaz of break-Down and and reassemble and it is easy to clean. It is small enough for the counter or storage area. If you are starting out and looking to explore the world of juicing - start right here. Enjoy!!