It’s worth it if you get the modular break out, have modular and have a good amount of hardware. Someone disagreed with me when I posted this before and said it’s great with VSTis too (yes it is) but I have made tracks with the Cirklon and honestly if you are mainly ITB, then with Ableton’s new sequencer updates coming out, you pretty much can do 80% of the stuff that the Cirlon can do. Actually 100% or more if you add in the Max 4 Live sequencers available.
Personally I prefer an MPC or an Elektron sequencer, but I do think the Cirklon is one of the most well-built machines I have owned. It just is very expensive and really needs to drive your hardware studio. For $800 I chose an MPC4000, which IMO does more, especially since I can feed it MIDI from Ableton and out into my hardware.
It comes down to personal taste in music and workflow. I am more into the house side of things and I love playing the pads to get ideas. Some people are more into techno and prefer step sequencing instead, so the Cirklon could make a ton of sense.
It’s just important to understand that if you don’t have a sync box in a hybrid system with a Cirklon, all that tightness will be for naught since the DAW will jitter. Plus the DAW’s MIDI can probably do more than the Cirklon can.
That said, if you feed the MIDI from the DAW into the Cirklon to trigger your hardware, you will experience gloriously tight timing (same with a quality MPC as well though).
Really boils down to the music and production style and studio build. For me, I decided it was overkill and not needed, even with a decent amount of hardware.