I bought the Tesvor 500 because:
- The maker was touting that their pattern cleaning was more efficient than random cleaning
- They had a very competitive price.
- I found that it does a good job of cleaning, but I have had to get used to moving EVERYTHING that might get in its way.
- The boundary markers that it came with are pretty much useless since it has a tendency to push them around.
- It sometimes has a hard time moving from hardwood floors to the rugs, over heater vents and over our air return.
- I had vacuumed the area the day before it was delivered,then ran it the next day. It picked up a fair amount of dirt, but not enough to fill the 0.6 liter dust catcher.
- It has a good battery that I charged overnight before the first use. It ran for at least two hours.
- I emailed their support, but have not gotten an answer from them yet.