Nektar Impact GX Mini

I originally bought this little keyboard to go with a Maschine 3. I eventually decided against the Maschine but kept the GX Mini as it was far from expensive. I have to confess that. so far, I have only used it as a keyboard, so haven't explored all of the advanced controller options available. However, even though I have a full sized keyboard sitting next to it, I've found that it is an excellent little keyboard, particularly when it comes to pitch-bend style lead lines. It seems that using a radically different controller to the one I'm used to unlocks a different approach to music making, unlocking unexpected creativity. I would recommend this keyboard for that point in itself.
The above might not be the case for everyone, but the build quality and features are great for a mini keyboard. It would take up hardly any room together with a laptop in a backpack, providing a highly portable system.
And of course, at the price, you can't really go wrong.

I just wanted to try using it to input notes to MuseScore 4 on a Mac and found out that it gave strange double notes.

It turns out that it does not send note off messages but note on messages with velocity 0. According to the MIDI 1.0 spec this should be treated as note off, but MuseScore does not do that.

Not really a fault, but it would have been better to use note off messages.

To use it you will need filtering of messages until MuseScore fixes this.