Since you guys have been so patient, we're going to file diary entries of our testing of the unit. That way, you don't have to wait for the final review to get the "scoop."
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The cats:
Shadow: Skittish/had behavioral problems that may have resulted in medical problems last time we changed litter boxes suddenly; male; around 10-11 lbs.; 3 years old
Harley: calm, but will urinate inappropriately when stressed; male; 13.5 lbs.; 3 years old (pictured above with the string)
Lily: Fearless and curious; very clean litter habits and a digger; female; 8 lbs.;9 mos. old
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Day 1: The unit arrived. It is a large box and is hard to transport in a normal car. Fortunately, it is not too heavy, just awkward because of its size.
Day 2: The instructions indicate that we should remove all other litter boxes to force the issue with the cats. Shadow and Harley had problems when we did this in testing before. This time, we chose to keep all litter boxes. We anticipate that they will choose the clean litter-robot over the others eventually.
Assembly: assembly of the unit was simple and the instructions are thorough. We were able to assemble the unit with only a minimal of reference to the instructions. We did read them afterwards to make sure they are complete and that everything was assembled properly.
Introduction to the cats: Lily and Harley were milling around the whole time the unit was brought into the test area, unpacked, and assembled. They were curious about the operation of the unit. Harley got into the unit half-way, but didn't seem to know what else to do. He may have been uncomfortable in the close quarters - especially with Lily around. Lily has a tendency to batter anyone who has access to something she wants. She did this to Harley when he was inside the unit. He got out soon afterwards.
After Harley, Lily got inside the unit and checked it out. She is much smaller and seemed to like it. She laid down in there for a little while. She was nervous about being in the confined space with Harley around. Our thoughts were that she'd have no problems once the other cats were away.
Both cats were a little unsure about the unit because it wobbles. The weight sensor is tripped when the cat steps into the unit. This makes it wobble. My bet is that they'll get used to it.
Shadow stayed in his hiding place while all this commotion was going on. This is normal behavior for him. We are hoping that he'll stay away while the box is operating so that he won't associate the noise with the box. This was a problem with the last unit we tested. We are hoping for better results with him this time.
The unit is unplugged as per the instructions' recommendations. We are around often enough to plug the unit in to clean it and leave it unplugged when we're away. Again, we are hoping that Shadow will become accustomed to the unit before we let it operate automatically.
Poops and peeps: We checked the litter-robot that night and there were a few poops but no peeps (clumped urine). The size of the poops indicates that Lily has used the unit.

