I cant open your link. We've run 5 sets of racework carbon cranks (in total, probably 15-20,000km), the old design that's prone to cracking (I cracked one). I've instructed my friends not to go beyond 5.5nM, which implies re-tightening regularly. Beyond that, it's a crank, it's light, we're happy. No problems with shifting once the FD is setup properly. And the new design solves that design flaw, afaik. 170mm only, afaik.
Racework is a shitty brand to deal with, though, but their pricing is attractive.
Honestly, I would do it all over again, because of performance / value / availability. If i were buying now, though, i'd probably buy Riro ones?