Well, here you go. I would never choose GCE, because I'd be worried about it going away, or Google increasing the price by some absurd amount with little warning and no feedback period, making my initial assumptions untenable, and leaving me to do a massive rewrite due to lockin on their proprietary features. Google did this with Maps (before backing off, perhaps due to backlash), and has done this with GAE in the past. Trust is a fragile thing, and hard to rebuild.