I am really very impressed by the look and size. My almost 6kg British Shorthair tomcat also found the space inside great.
BUT I unfortunately had to send it back without fully unpacking or connecting it. So I can't say anything about the functionality.

I have a stand-up urinator and since there is a small gap between the litter area and the inner wall all around, urine would regularly run down there. This would of course stink and mean considerable cleaning effort.
Otherwise, the toilet made a really great impression on me. I just wish the litter area was completely sealed on the sides.

We have been using this cat toilet for a few weeks now and are actually very satisfied.
Actually, because we think that an app connection would have been timely. Because who runs to the toilet and looks at the display to see how much the cat weighs?! That actually makes more sense if you have an app connection and multiple cats and thus have control.

Otherwise, I can say that even if you just put a hand in during the cleaning process, this toilet stops immediately. I hope it stays that way. Technically, we cannot complain.

I don't know if with the reviews where the smell is a problem, it might be due to their cat litter. Or if they never press this UV button. We are happy and so are the cats.

But it would be nice if there was an open cat toilet from Astropet in this style. Not like the one with this rake part.
Our bigger cat weighs eight and a half kilos and likes to go into the Jupiter. For this, the litter could be a bit higher in some places. He likes to go to the edge (due to his length) and there a clump always sticks.
I could imagine that this would no longer be the case with a large, open toilet.

What didn't work at all, however, was the delivery with DHL! The driver didn't feel like delivering the toilet one day and just secretly placed a package from the big A* in front of our door without ringing the bell. And the next day he just delivered it next to the sidewalk on our open property, even though we were home. Since you can see what's inside the package, it would have been easy to throw the part into his car and drive away.

The Astropet Jupiter litter box was immediately accepted by our 2 cats. Only the "beeping" notification that the drawer is full comes a bit too early.

Unfortunately, we are not entirely convinced.

After two weeks, the cats are finally using the box, it is very quiet and tidy in terms of cleaning. But after two to three days, the smell is unfortunately too strong, and even the manual UV light (2-3 times daily) is not sufficient. Sensors work well.
The side parts, available separately, slip; a locking mechanism on the box itself would be helpful. Price-performance is not quite justified even though we bought it with a discount. All made of plastic does not seem very valuable.
More technology possible with app operation, or data evaluation

A litter box large enough to clean less frequently. Indeed, I don't know why, but my cats have the bad habit of peeing on the sides, where there is no sand or grains, which means that you have to scratch in these places; and this despite the space being large enough for them: they are a sibling group of 2 Bengal cats (one male and one female). The only downside is that the litter mats were not available at the same time and they are essential to prevent the cats from putting grains or sand everywhere in the house and allows them to enter more easily, also, Great.