For a headset, I use a RoadKing RK400. Keeping that thing charged is rarely an issue. If any thing, the charging drawback is that it doesn't need to be charged on a daily basis, so I sometimes forget that it needs charging.
On other threads, I have stated my suspicion of DAS brands, as far as radio stuff goes, but they did get the Bluetooth headset right. It costs less than the comparable Blue Parrot or Blue Tiger headsets, and has a ridiculous amount of talk and standby time. The noise canceling boom mic cancels out the background noise wonderfully. So impressed have I been with that device, that I gave one to my very soft-spoken best friend, so that I didn't have to respond to every single one of his statements with "Huh!?", or "Say again? ".
I have found that when I am not driving, it's still a handy device. If my parents or snivelings call me, while I'm doing something, I can talk to them and keep on doing, even if it requires both hands. By the way, I think that you can pick one up from Pilot or Flying J, right now, for about $50 (after mail in rebate)
But, if you still have your heart set on that 29LXMAX, I did note that it had good reviews on Amazon. I doubt that you'll find many users of that particular radio on this board; maybe the fellows over at Trucker Report have some experience with it?
I did get the impression that some of its features may be dependent upon others in your vicinity having the same radio, but maybe not. I note that there is a supplemental app that you install on your smartphone, and that app may have access to a national database that stores info, for example it may notice popular speed trap areas, and alert you when you are approaching one.
So, read as many reviews that you can on the radio, try the folks at Truckers Report (searches occasionally land me there; I have noticed that a couple of guys here, are there, too), and download the manual from the Cobra website, and read it.
If you DO end up buying it, I'd be interested in knowing what you think of it. While I find the Bluetooth feature redundant, and the lack of SSB to be a turn off, I do find the use of modern technology to be interesting, and would really like to know how well it all works, in practice.