Dreadbox does some interesting stuff...their Greek-lettered modules are amazing, sort of akin to the Roland Aira Eurorack modules done correctly, all inherent flaws fixed. I also like their cab design for their bigger prebuilt systems, with utility modules included as an integral part of the cab itself. Reminds me a bit of what Synthesizers.com came up with with the Box11 5U cases that include built-in mults and power harnesses, or the 1U row in the middle of MakeNoise's Shared System. I wouldn't mind seeing more of this idea, actually...having basics such as mults, attenuators, basic mixers, etc as integral modules provided in some cabs (small portables, especially!).
Werkstatt? Yeah...remember, it's got that infamous Moog ladder LPF in it, and that alone is worth the price of admission. Even if you just used the Werkstatt as a processing filter, you'd still be getting your money's worth of use.