I have a roomba, but wanted a mop feature. I have stained concrete floors, and wore off some of the wax by using a pre-treated pad.
I had to go to youtube for an instruction video on how to use the mop feature. The instruction booklet completely ignored mopping, and could not find on the mfg website - or I would have given 5 stars.
I was pleasantly surprised on how well the mopping pad covered the floor, and my husband agreed. There were a few spots that I missed when using the roomba to vacuum, and the Tesvor picked that up, and stored in a separate compartment in the middle of the water storage tank.
VERY happy with this inexpensive unit!