i had the original samsung robot vacuum which i loved.  however, it was time to upgrade.  this vacuum met all expectations.  it allows me to manage my 2700 square foot home with ease.  does an incredible job.  the smart app allows you to control which rooms you want to vacuum. this is helpful in larger homes because it takes two or three rounds of charging to get all the areas of my home.  never had an issue with it not finding its charging station.  would highly recommend.