Got it yesterday, and after testing it for a day, must say that it's really impressive, for the price, especially if u compare it against the $1k+ top-end models from Neato/iRobot etc
Pros:
Very good at mapping out and vacuuming the house thoroughly, primarily the 2 main bedrooms and living room. Suction is way more powerful than my old cheapo one. Able to navigate and not get stuck from the furniture and stuffs. App shows the path and time taken, ard 48mins and from 100% battery, only used 24%. Able to use app to automate/activate cleaning and monitor the progress live from outside.
But some cons...
1) cliff sensor not sensitive enough to detect the drop of abt 3.5cm from the living room to kitchen ( yellow arrow ), thus once drop to the kitchen area, it is unable to go back up. Temp measure is to close door or use chair to block. Perm solution would be to place a magnetic strip.
2) The bump from sliding door to my PC room (green arrow into the red area) will make it stumble abit and turn it around, thus unable to cross over. Interim measure is to manually place it over into the PC room to continue cleaning. Might need to place some rug mat to facilitate it crossing over.
Overall, a very good robot vacuum (for the price). Hope it can last long enough hahah.