The Tineco Floor One Stretch S6 is the predecessor to the S7 Pro above, and the two vacuums are identical in terms of their LED screens, runtime, charge time and cleaning modes. But where the S7 Pro excels in its cleaning performance, the Stretch S6 shines in its flexibility. It's called the 'Stretch' S6 because it can lay completely flat, but what separates it from others that do this (like the Dreame H14 Pro), is that it automatically adjusts the power to avoid any loss in suction. Tineco also built the clean water tank into the floorhead so that the water source is uninterrupted when in this position.
The Tineco Floor One Stretch S6 was able to clean every mess I threw at it, just a little less efficiently than the others in this guide. It cleaned ketchup, mustard and pasta sauce after a single forward-and-backward pass, but struggled to vacuum egg shell pieces as quickly. The floorhead opening is narrower than others (see our vacuum jargon buster for more detailed explanation of these terms), which explains why the large pieces need repeated vacuuming so the brushroll can crush them down first.
I found a similar performance with milk and cereal, where the milk was vacuumed immediately but the cereal was pushed around until I eventually lifted and dropped the vacuum on each piece to get the last of it. But even though it can be a bit slow, it can still handle all the things you can clean with a wet and dry vacuum. It's also worth noting that these standardized tests help us find out everything the vacuum's capable of, but might not be reflective of the typical daily floor cleaning you'll be doing at home most of the time.
If you have any back, hip or knee pain, and struggle to bend or crouch down, it's worth knowing this vacuum-mop's water tank is located in the floorhead. You'll therefore need to use your own container to fill up the clean water tank as it can't be positioned under a kitchen faucet. Otherwise, I'm a big fan of the Stretch S6, and if you want to spend $100 less than the other two top performers in this guide, look no further.