The X4 encouraged me to jailbreak my Kindle to get the KOreader Sync feature, and I LOVE it. Unreal.

As the title says, I spent the past day tinkering with the Kindle (after getting crosspoint installed in 5 seconds) so I could install KOreader. Once I got that up and running, I put the identical book file on both readers and the sync feature is amazing. Before I leave the house, I just pull the location to my X4 and when I get home, I push it to the Kindle.

Only had the X4 for 3 days, but it has proven it's value so freaking fast. Huge fan of the device. And Crossppint. And KOreader. Thank you smarter people who can build out these amazing hacks.