Well, we finally had a chance to try one out! Read on for our reactions...plain dark chocolate cake. There are a couple reasons this was a good recipe to test this mixer blade. First off, it's a one-bowl cake. You dump all the dry ingredients together, mix them, then mix in the wet ingredients. Secondly, it's chocolate, which really lets you see when everything hasn't been mixed properly - the streaks of white are very telling! And third, I did a double batch to see how well the blade could handle large amounts.
Conclusion: I wouldn't buy this JUST to avoid scraping down the bowl. But when you're making cakes and cookies, it's best to get the bottom of the bowl scraped as you go along. When you scrape and mix in later, it often creates a little unevenness in your batter. This is a great tool to help you get a more even texture and easier mixing. Recommended!
ETA: We found out that the fins on these Blades are not silicone as we first believed. They are actually a proprietary rubber that will not spider crack in the way that silicone often does. Also, I was using this with my mother's machine. She since used it herself and now I cannot pry it out of her hands. She was like, "What IS THIS? It is AMAZING! I cannot believe how it CREAMS!"
So, I will be buying my own version of the BeaterBlade+!
• BeaterBlade+ Official Website, with links to online vendors. A blade costs between $24.95 and $29.95 depending on the KitchenAid model it's designed to fit.
Also check out the SideSwipe Spatula Mixer Blade, a very similar product.