I am not publishing any photographs as you will receive what you see at the photographs. In my case, the sleeve was Apolonia Lapiedra one, so it is a mess, as I purchase that sleeve aside.
It is not very heavy but voluminous, so I can handle with one hand, but I have big hands (25 cm), if you have smaller hands, a strip will be a good complement.
Noisy? Not very much, but it is a machine, so noise is there. If you use headphones, nothing to worry, but if you see TV, computer or whatever, noise will be there.
Use? I didn´t try interactive, so I don´t try it. I used with videos and it is fine, as it is following the action, but repetitive and predictable from my POV. Manual is the best option. It takes some time to get the better use for you (better to not to expect anything in your first sesions). Once that you get the use, you will love it.
It is expensive,but well recommended.
Regarding Fleshlight sleeves, they can be used (Kiiroo is not keeping guarantee if not Kiiroo items are used) and I will recommend to use them as they have much better texture and finishing that the Kiiroo ones. Only issues is that the outside is a little bit wider and you will need to cut 2-3mm strip and the sleeve is much longer, so you can keep as it is without the top cup or just cut a few cm to place the cup on top and get a vacuum effect.
Sleeves? Not the best ones... better to adapt Fleshlight ones.