This is a wonderful juice extractor. Read between the lines when reading appliance reviews; it will not be easy to find a juicer to meet this machine's minor shortcomings.
I'd say the two most important things to look for in a juicer are motor power and build quality, and this one is tops in both respects. The metal body has confidence-inspiring heft and the two-way power switch has a high-quality feel to it. Plastc parts are thick and very sturdy. The filter is riveted steel plates attached to a heavy cast-resin base.
As for power, 850 watts is toward the high end of the consumer-oriented spectrum. This makes for stable operation with all kinds of fruits and vegetables (as usual, avoid bananas), and enables Kenwood to incorporate a larger feed tube than you'll find on sub-500w models. No need to core those apples, although larger ones will still have to be split. The motor is also pleasantly quiet on low speed and not offensively loud on high, unlike my previous 350-watt model which always sounded like it was chipping wood.
Some will find the juice from the JE810 on the pulpy side, and many juicers will provide clearer juice. But let me say this: If you are SERIOUS about a healthy lifestyle, remember, first, that you will get more nutrients with a pulpy juice, and second, undiluted fruit juice contains massive amounts of fructose, and by giving your body some fiber to work with you can help counteract this massive sugar influx. Fructose by itself ain't much better than sucrose. Personally, I much prefer the taste of slightly pulpy juice; isn't that why people buy Orangina?
The expelled pulp is dry enough, but what is left on the underside of the plastic cover is on the soggy side. You can send this through again if you're up for it. It's a common juicer problem.
Other minor niggles concern the feed tube. It's much bigger than most, but I wish it was slightly bigger still, to allow larger apples through in one piece. Also, the springy stopper at the bottom of the tube (helps slow big fruit on its way to the knives) can sometimes catch skinnier foods, making them harder to push down. Loading carrots three or four at a time ameliorates this issue.
As for cleaning, it's is no harder than with other juicers. It's boring, but not hard, and well worth the five minutes. Remember never to stick the filter in the dishwasher. The instructions say to wash the other parts in hot, soapy water; no mention is made of a dishwasher at all, in fact.
This appliance is a pleasure to use. Consistent juice quality, low noise, smooth operation. Looks sexy and purposeful. Buy quality; it will help you stay disciplined about your juicing.