It doesn't include a cable. It's definitely more expensive than having a separate AC and car adaptor. I happen to have two less expensive USB car adaptors and an AC USB adaptor that I previously bought. I use the AC adaptor for charging on a daily basis since I hate the one that came with the Axim.
But the Boxwave is more efficient to carry around, especially when travelling. I got my mini-sync from eBay, and I have a couple of other Axim cables I keep in the cars, also bought from eBay. I just keep them in the center console armrest compartment for when I need them, along with a spare cable for my GPS and phone.
If I knew when I bought the cheaper adaptors what I know now, I probably would have bought the Boxwave first. But in the end, I wound up with multiple USB car adaptors that I just keep in the car, and have collected a suite of USB charging cables for phones, my GPS and my pocket WiFi access point, as well as the Axim, and one adaptor does it all. I've even got a couple of USB hubs so I can charge multiple devices at the same time.
I've got more ways to power my X30 than you can shake a stick at (what does that mean, anyway?).
I've also got one of these:
http://store.yahoo.com/semsons-inc/pocpowban.html, which I used to charge my Axim the other day when I didn't have access to a car or AC power supply. If you can't tell, it has the USB power jack to plug into also.