The Furthrrrr oscillator has quickly become my favorite complex oscillator, and the feature-packed Grand Terminal has immense processing capabilities. Unfortunately i soon realised, that using the Shuttle Control module as the main source of modulation (namely melodies and rhythmical triggers) does not work very well with my workflow. Note that I am using Ableton Live as the external sequencer connected to the Shuttle Control. If you are used to work with external sequencers such as the OP-Z or Digitakt, then I believe this makes complete sense and is a great mediator between the digital and analog worlds!
Also, a slightly annoying issue with the system is its power distribution. The previously mentioned Shuttle Control module also doubles as a power module, but it is somewhat unstable (a light touch of the inlet cable results in weird pitch fluctuations). I resolved this issue by integrating it into my new Eurorack housing, and hence bypassing the Shuttle Control as the power distributor.
In conclusion I believe this is a very powerful system with an immense sonic palette (specially thanks to the Furthrrrr generator), and countless practical features. Unfortunately the build quality does not seem to be at the level of other Eurorack modules, and my workflow with the Shuttle Control is not ideal (the latter being 100% subjective).