I have had this box for 6 months and just bought a second one. 
I absolutely love this cat box. I have a cat who never leaves my bedroom. I never smell the litter box! It is awesome! 
It was easy to install, clean and maintain. No issues in the six months it has been in daily use. 
The app works well and also works for my automatic feeders. I like having only one app on my phone!t