Mugen 3800mAh Extended Battery user experience?

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http://forum.xda-developers.com – Thinking of getting one of Mugen's monster batteries, since I barely last half a day on stock (mostly due to games). Most of the posts say the battery life is great but the case messes with Wi-Fi and GPS. I've come across a few posts claiming that that problem has since been fixed. I'd like to know if that is true, as well as how the battery has been holding up to long-term use. Thanks. The extra thickness won't be a factor; I actually find the phone too thin to hold comfortably, so it'll probably be a plus. (HowTos)