Current TBOLT and bionic owner here. totally worth it. Especially since you can go to any store right now and pick up the extended battery for only $25! Just did it today and the rep told me it was good on all extended batteries til the end of the month. It doesn't make the phone nearly as big as the extended Tbolt battery does, and I think it gives it a more solid and durable feel (although, definitely heavier). The best part is that yes, sim swapping works just fine. I swap mine and can make calls/use sms instantly, and a reboot five minutes later enables data. I swore I'd never buy another moto phone but the bionic is king in my book (at the moment). With all this ram space, I don't see how a1.5GHz DC processor would make any difference rumored nexus prime processor). Its so freaking fast. plus the new moto skin is pretty nice. I don't miss any of the features of lp, adw, go launcher, our even sense 3.0 (the lock screen is sexy, but it never actually saved me time). Plus, if she's cool with you taking the upgrade, you can always pull the tbolt back out for nostalgias sake.
Hope I could help.
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