This happened to me too. I thought they weren't going to release this for a while? I rather have the relay for the texting from my iPad.
Oh, great, now I can get unsolicited calls on my iPad. I've been getting bombed by robot callers on my iPhone. So now my iPad will get them? I may have to turn this feature off.
Continuity works great. I can even initiate calls from my iPad by just clicking on the contacts number and then the call will go via the iphone . Works just as apple claimed. Can't wait for sms relay and using this on Yosemite