Sorry, must have missed the post where you said you bought the Blackwidow, I'm sure you will be happy with it, it's an excellent keyboard.
My reason for not wanting to use razer hardware with Synapse 2.0 is because I'm not keen on them requiring internet activation prior to using their drivers. There is no reason that the software couldn't work offline by default, and upload preferences to their cloud storage once an internet connection is available and the user set the appropriate option to use the cloud storage.
They however have decided to required it to authenticate with their servers prior to allowing anything other than plug and play functionality to work. While it's a trivial thing (and I agree it's pretty trivial assuming their servers are online), there is absolutely no reason their software should require it to connect to their servers before being able to go into an offline mode.
I don't agree with their design decisions, and will look elsewhere for new hardware until they address this functionality of Synapse 2.0. In the past 6 years I've owned 2 Lachesis mice, a Tarantula keyboard, and a Blackwidow Ultimate. That is the way it's been up until this past December when I needed a new mouse and purchased a Logitech instead due to the design of Synapse 2.
IMHO, hardware shouldn't require internet activation to allow for the full functionality you pay for (and in the case of Razer products, you pay a premium for). Again, I agree it's not a huge deal to just install it, activate online, and then set it to offline forever, but it's the principle of the matter. And unfortunately for Razer it means I won't be buying any more of their products until that changes.
Through all of my experience with Razer, their hardware has worked very well for me, and reliably, but Synapse 2 leaves too bad of a taste in my mouth at the moment. I hope that changes in the future, but only time will tell