Basically, new vacuum cleaners are produced in series, and several different models from the same series are often very similar. The very first series, released in the middle and second half of the 2000s, were the 500, 600 and 700 series. They became pioneers in this field and were the first that applied the HEPA filtration technology, the virtual wall, Max Mode. Some of these robots (mostly the 500 series) are currently out of production, but you shouldn’t get upset, because more technologically advanced models replaced them.
But obviously not all of them are really that great. And you should know that none of the companies that aren’t that good will ever tell you the truth. You will thus need to go through stick vacuum reviews carefully before you make your selection. By going through the review, you can learn about a few good products. You can get important information about the features and benefits of each stick vacuum product. This information will certainly help you make the correct decision.