I have used the same 3L camelbak bladder for close to 10 years. Quite impressed with the mileage I have gotten out of it.
Ya, me too......I've been using the same Camelbak for 12 years without issue. I use the dark smoke colored Mil-spec one, with the insulated hose. You do need to lube or change out the o-rings on the hose where it attaches to the bladder every now and then though. I love being able to fill it with my filter through the drink tube.
I have this same exact model, going on 7 years...never changed out an o ring yet, although that is good to know.
What do you think of the push-pull valve? I've only ever used a bite valve so wondering how this one compares. I'm concerned about water squirting out as soon as you open the valve.
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If the bladder is compressed hard in your pack the water will start flowing when you open it but if its just sitting in a regular pack load it doesn't seem to push on it enough, I typically use my teeth to open it though so its in my mouth already.