I have never used a Littermaid with a young kit, and I don't know that I would.
However I have had 2 that I used with my adult cats.
I had the first generation Littermaid, which was ok, but I didn't think it was powerful enough (the motor) it was also a large pain to clean! It did not come apart well. After a year the motor slowed down and half the time it can't scoop the poop!
However, we just got the newer Littermaid Mega Elite. So far I think it's great.
We've had it for a month. The motor is more powerful, the box is bigger. You can take it apart very easily, the rake just slides out for easy cleaning, and it comes with an ionic air cleaner which turns on every time it scoops. As long as I keep my eye on it every 4 days and remove any litter my gang might have swept up into the sides it runs just fine.
So, it can help so that you don't have to scoop litter every day.
But it still does require regular cleaning and maintenance just like any litterbox.