My nexus wifi only was bought from Grays, like many others on this site I suppose.
Was prompted that software update Kitkat downloaded and ready to install. Afraid to update due to issues I had with 4.3 before. Anything significant change, or any issues encountered after updating to Kitkat?
Just grab the Nexus Root Toolkit, if anything goes wrong, you can flash back to 4.3. I did this for a friend of mine who got his device bricked.