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.
We like this juicer a lot. It has a HUGE container to catch the pulp, so you can make lots of juices at once and bottle them. Also, the chute is really wide - we throw whole (smallish) apples, oranges and pears in it so we don't have to mess with slicing everything up. It pulverizes everything with no problem. The spout releasing the juice is a little wonky; we had a hard time figuring out what was actually fully open vs. fully closed (we are smart people with college degrees, I swear...it is honestly just a little unclear when you are twisting it). The pitcher catching the juice is great; it has a nice spout for us to easily pour it directly into bottles. The main downside is that it is a pain in the butt to clean, but that is every single juicer on the market, not just this one, so you can't hold that against it. Overall, we would definitely recommend this one!
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!!