I was in australia this year and paid $35 AUD (~$27USD) for 4GB of tablet data plan on my iPhone from Vodafone, coverage was amazing. This GigSky is a rip off, they are trying to be the Apple of worldwide data plans....$50USD for 500MB is a joke.
I understand if the plans were truly worldwide, but the fact they are limited to each country, its purely gouging consumers.
I will never take part in this, rater stick to getting local SIM's during future travel as its cheaper than this "convenience tax". I'm surprised Apple even bothered to team up with such a company....why not team up with T-Mobile instead as they offer "Unlimited 2G Data and Unlimited Texting in 120 countries + $0.20/minute" to their customers so why not put a price on it for travelers that are non-customers.
I would pay $30-$50 just for that to roam as I am not a T-Mobile customer currently, it would be enough data to get around and using a maps service, whatsapp, check emails etc.