I had a friend how got a Freerunner, but he returned it after a few weeks because "no matter how awesome it is, I need something that can actually make phone calls". So it certainly didn't work for him on day zero.
Can't second that ;). While my Freerunner was indeed able to do phone calls on day zero, it also turned in hands-free talking automagically without any possibility to turn it off. This was a lot "fun" especially in public places. So maybe we are talking about the definition of "making phone calls" here.
I then flashed a fully featured Debian on it which was able to do everything except making phone calls. I was so excited about that while all my non-techie friends were like "Well, lucky you but now you have a so called Smartphone which isn't even a phone."
Dropped it as a daily driver after two weeks or so to leave it on my desk for a long time until someone on the Freerunner mailing list asked if someone is willing to sell theirs. 20 people offered theirs for free so I couldn't get rid of mine. Gave it to an Open Device Lab then, they still own it but never listed it in their device list.
But somehow I don't regret buying it in the first place.