Good suitcase, honest. It seems well made and of good quality. Satisfactory in terms of space, but I think it could have better ergonomics. It fit on a Bandit 650 S with the included base without any problems.

I got the suitcase about a month ago. I also got the back pillow so it came out to about the same money as others that had it integrated. I chose it because its plastic looked better and quite a bit more durable. In washing, it didn't let any water through at all. It fits two full face helmets although there isn't much space left afterwards.

Very good suitcase, plenty of space, the space is sufficient but in height not in width, like other suitcases that are a little wider but still it is more than enough!

Good but it doesn't work for ttdm, you have to make modifications on your own. Also, it can only fit two small helmets or two somehow compacted jet helmets. I have a premium one with a small wing at the back and it doesn't fit a second one together. The other positive thing is that it was tested in a literal flood and not a single drop got inside

Economical kappa suitcase may be the best for its price. It can actually fit 2 helmets inside without having many other things. It is beautiful and discreet. The only thing that concerned me was that, compared to another one I had from Givi, it closes simply by pressing it downwards and I was wondering if it closes/doesn't close. For now, everything is fine with it.

Very beautiful, one of the best that kappa has produced. If the lighting it has (55 euros) was a little more affordable, it would be even better!

Very beautiful and very good quality construction. But it barely fits my two helmets. One is a medium flip-up and the other is a large full-face. I would like 1-2 liters more for the lid to close easily.

Very good and economical, for two helmets. Easy locking - unlocking. With its own base which I did not use as I already had a Kappa on top. More with use. So far I am satisfied with the purchase and would recommend it for someone who wants an economical and reliable solution.
Update
Having now a three-month experience with the use of the top case, I have no particular changes to note in what I wrote, perhaps in terms of closing you may encounter a slight difficulty when the case is heavily loaded, otherwise everything seems fine after use in the summer sun.

Very good suitcase. The shape helps with aerodynamics and the steering wheel doesn't have much vibration compared to other suitcases. It comfortably fits 2 full-face helmets and another positive is that it fits both kappa and givi bases (monolock and monkey)

Very good luggage carrier, easy locking. But it needs a different base than the one it comes with for a large motorcycle.

Very good top case, it actually fits 2 full face helmets... Beautiful and very sturdy construction!! It doesn't let any water pass through in the rain!!! Very easy locking and unlocking with a button!!!