Like @tr909, I also use an older 1st gen iConnectivity, ICM-0101 USB MIDI host to connect USB MIDI devices that don’t have a DIN MIDI port to Elektron gear.
My current preference is the MIDI Fighter Twister thanks to its portability despite having large and comfortable encoders, as well as its high level of customization.
The LED color bars and LED indicator dots can each be tailored to your needs, and that personalization really helps to make sense of a 4x4 encoder grid (it also has 4 banks which is handy for synth programming).
The encoders are also push buttons which I use to reset values, but they can also send MIDI notes which is helpful in mapping to a DAW.
Generally, I use it as a mixer for OT, offloading levels and EQs to the Twister where I can develop some muscle memory there and not have to page between tracks all the time just to change the common parameters used for simple mixing
It frees me up to do more cross fader jumping, muting, re-sequencing. fx tweaks.
And all of this (besides cross fader jumping) could be translated to Digitakt.
I justified it over a $280 Faderfox because DJTechTools was running a $159 sale on it, and I figured that even with the added cost of a USB MIDI host, the total price was comparable enough and I really really like encoders with indicators (always wanted a Nord Lead Rack 3). Plus it is far more portable than the BCR2000, which is a great controller in its own right, I’m just tight on space.
Lots more info in that link above, in this post.