Tineco Pure One A50S

Should you buy the Tineco Pure One A50S?

The Tineco Pure One A50S is for someone who wants a big 1 L bin, 70 minutes of runtime, and a dust-sensing brush at $329, without going to the $600 Dreame Z30. Its 3DSense head adjusts suction automatically, and the LED display shows dust detection in real time. Reliability at 73 is the lowest of any cordless we rank above threshold, and that keeps it at ninth. The Shark Stratos at $399.99 is the safer step up.

Where it earns its score

• Value leads the card at 80. A 1 L bin, 70-minute runtime, and auto-adjust suction are a lot for $329.
• 1 L dustbin. Larger than most cordless sticks, and more than double the Bissell PowerClean's cup.
• 3DSense smart brush. Detects debris and raises suction on its own.
• 70-minute runtime. Second only to the Dreame Z30's 90 minutes in our list.

What to know first

• Warranty is the weakest ViperScore factor. The 2-year Tineco limited warranty scores 66.
• Reliability is 73. The lowest Reliability score among the cordless models we rank.
• Satisfaction is 78. Owners are less enthusiastic than with the cheaper S20.
• 185 W suction. Tineco quotes watts rather than air watts, so direct comparison to Dyson or Dreame is difficult.

Questions buyers ask