Every negative review I read here is accurate. I had the LR1, LR2, and now the LR3. LR3 is a downgrade, big time! You will babysit this unit more than the hassle of scooping a regular litter box. I never had issues with the LR1, it was great! LR2 same as LR1, I just did not think the bubble was necessary. Very disappointed with LR3.