Satisfaction Survey of Dreame Robot Vacuum--F20 Series

We sincerely hope that Dreametech has delivered a wonderful product experience. This survey will take you no more than 15 minutes to complete. Help us do better by telling us how you really feel! 
Note: Since there have been iterations in the beta machine's firmware version, please base your evaluation on the latest one or two firmware versions.
PARTⅠ Overall satisfaction
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1.
If your friends and relatives want to buy a robotic vacuum with similar functions, to what degree would you be willing to recommend this Dreame robotic vacuum to them? (Please rate on a scale of 0-10)
Not possible
Highly possible
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5.
How would you like to rate the overall experience of this robotic vacuum? (Please rate on a scale of 1-5)
Very dissatisfied
Very satisfied
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6.
What are your most satisfied features of the model?
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7.
What are your least satisfied features of the model?
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8.
Has your machine ever experienced any of the following problems?
[Multiple]
The dust bin filter was clogged
can't recharge/dock itself
Water stains and streaks left on the floor after mopping
Some rooms or parts of the area weren't cleaned.
False report of dust bin not installed
can't cross the threshold
Other problems/malfunctions, please specify:
The above situations have not occurred
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9.
Please describe your attitude towards the 20KPA strong suction.
How is your experience with this function? What are your satisfied or dissatisfied features of the function? Do you have any concerns or suggestions about it?
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10.
Please describe your attitude about the non-expanding side brush for corners.
How is your experience with this function? What are your satisfied or dissatisfied aspects about the function? Do you have any concerns or suggestions about it?
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11.
Please describe your attitude about the two clusters of side brushes with a main brush featuring anti-tangle bristles. 
How is your experience with this function? What are your satisfied or dissatisfied aspects about the function? Do you have any concerns or suggestions about it?
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12.
Please describe your attitude about rolling brush current carpet detection.
How is your experience with this function? What are your satisfied or dissatisfied aspects about the function? Do you have any concerns or suggestions about it?
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