Unlike the Krups GQ502D, the Chef’sChoice 840B does not handle thin batter well—in fact, the manual explicitly states, “A thicker batter that pours slowly works best.” This model did a great job with Bisquick batter, turning out perfectly cooked waffles every time, but with our favorite yeasted batter it produced blotchy, limp, flat, and soggy waffles. So the Krups model is the winner in terms of versatility.

There are more than 3,250 user reviews on Amazon, and most are positive. "That sound you hear is the Angel choir when I finally sat down to golden crisp waffles. I had been craving them for months - not the thick Belgium ones, but the old-fashioned, round, thin crispy ones. Easy to use, makes delicious waffles. I used a setting between 3-4, and they came out perfect," wrote one verified buyer in March 2017.

With the free digital recipe book, you’ll have the power to make amazing waffles that will reboot your spirit and import a gigabyte of flavors to your body’s hard drive! Included are classic, paleo, vegan, and gluten-free recipes. Step out of “safe mode” with recipes for hash browns, paninis, brownies, and more. With the fun and easy-to-use Keyboard  Waffle Iron, you can upgrade your creative cooking skills without the pesky updates!
This did the job, but it sure wasn't streamlined. Here is a photo from a World War II era training pamphlet. The subject was "How to use electrical appliances." Many rural households were just getting electricity due to the Rural Electrification Administration (REA) and the pamphlet was intended to get folks up to speed with the rest of the country. This photo shows the Government-approved method of "seasoning" a waffle iron (you put oil on it and let is burn in, creating the organic equivalent of Teflon). Any vegetable oil will do.
By the mid-16th century, there were signs of waffles' mounting French popularity. Francois I, king from 1494–1547, of whom it was said les aimait beacoup (loved them a lot), had a set of waffle irons cast in pure silver.[26][27] His successor, Charles IX enacted the first waffle legislation in 1560, in response to a series of quarrels and fights that had been breaking out between the oublieurs. They were required "d'être au moins à la distance de deux toises l'un de l'autre. " (to be no less than 4 yards from one to the other).[15]
Waffle sandwich caterer Matt Maichel, who also greases the plates before each use, had specific batter advice. “You should take your dough out of the fridge to come to room temp, or it will not cook as well,” he said. “The trick to filling is, find a batter that you like; the viscosity determines how much goes [on the plates]. Thicker stuff doesn’t spread out as well, so you might have to help it.” (We found in testing that a spatula or the back of a ladle worked well for this.) “You use the least amount of really thin batter because it goes all over the place,” he added.
Sadly, those are the only nice things we have to say about the new Oster. Despite being rated for the same wattage and designed in nearly the same way (even the maximum warm-up temperature was basically identical to the old model when we checked with a K-type thermometer probe) this model does not cook satisfactory belgian waffles. We even sent the first machine we got back for a replacement, certain that it must be broken.
Most modern waffle makers run on electricity and can be adjusted to produce lighter or darker waffles. Many, but not all, have indicator lights and audible beeps to cue you through the preheating, battering and cooking stages. Even more important, the waffle maker should maintain consistent, even heat to make sure your waffle isn't overcooked on the outside and mushy on the inside, or cooked in some places but not in others.