Is this really 'instant'? I tried using Coinbase to buy Bitcoins a little over a month ago. Spent a week or so logging in repeatedly, including right at 6 AM EST, which is supposedly when the site 'resets' and the day's limit goes back to 0. I was never able to buy; kept getting "Sorry, we're over the day's limit" error messages again and again. Tried a solid 10 or 12 times over the course of a week. I guess that means things are good for Bitcoin if it's turning away that much business (I assume there are legions more and I'm not the only one), but it certainly sent me, for one, looking for alternatives.