I tried several modular approaches. Amongst them were SuperCollider, CSound, pd and lately something called overtone. And I liked all of them (CSound was the most capable IMHO), but I wanted something tightly integrated with my DAW of choice/workflow. And I am a working 60% on Linux and 40% on Windows, so Reaktor was for my Windows sessions (I dont want to install cygwin again).
I got Reaktor 6 for half of the price, so I thought it would be good deal. After 3 days of trying it out thoroughly I am not impressed. It is slow and it it has nothing, that pd doesn’t have. For 200 bucks it certainly sucks compared to all of the above alternatives.
So just as a warning for anyone considering buying it.
Have a nice day.