I have a Charge LR too.
I've tried a lot of different packs over the years & all of them ended up giving me backache, or bounced around when riding DH out in the Alps, racing enduro etc. Drove me up the wall, as the only way to stop it was having the straps crazy tight.
Where the Charge sits a lot lower, it's massively more comfortable (for me). All the weight sits on the hips so is all good. It seems to move around a lot less also.
No issues with the bladder, filling it or in use. I've never had one of the 1/4 turn ones before so it's a revelation compared to trying to open the old ones. It's a little more awkward to put in the bag than the usual one, because you have to feed it into the wings, but it's not difficult.
The bag itself is light, and probably wouldn't survive a decent crash as it's a lot thinner than others. Storage is 'very' limited. I can get pretty much everything in there, but if out all day, food & a jacket makes it bit of a solid sausage on my back.
Overall, I like it & would recommend one. I've had bigger packs & end up just carrying more crap I don't need.