A well-meaning but /in/ relative of mine bought me one about a year and a half ago.
No way in fuck did it have a flow rate that could keep up with normal sucking on the straw, I really had to work to get any appreciable water out of it, it definitely would not keep up with the needs of anything even slightly aerobic (slow strolls across flat ground maybe, but anything with weight or significant elevation change fuck no).
The capacity would be fine, IF it weren't physically larger than a 1L Nalgene. It's slightly fatter, and almost as tall as a 1.5L screw-cap bottle. The bottle itself weighs over a pound, which may not bother some people but when I compared it to my existing setup (a Sawyer and 2, 1L Nalgenes) it weighed more than my whole setup while having a third of the capacity.
I've never dropped mine or taken it when it's below freezing out, and it still cracked right at the start of the cap threads, just from kicking around in a daypack. At about the 4 month mark of light use walking groomed trails on flat ground with my wife and dog. I contacted Lifestraw and they told me to pound sand because that was "normal wear and tear" and also that they have no warranty at all (you may return unused products purchased through their webstore and only their webstore within 30 days of purchase--not receipt, but purchase--only, they do not accept returns from any third party vendor. Once you use it, you're stuck with it, even if there's a clear manufacturer's defect). I don't know what the fuck they're made out of but it damn sure isn't Lexan.
Also, while hardly unique to the Lifestraw bottle, it leaks if not kept perfectly upright. Like all straw-bottles. >that's what replacement straws are for
Those have a tenth of the usable life of a Sawyer Mini and cost more while having worse flow rates, worse filtration, and being more prone to freeze damage.
Sounds to me like you have buyer's remorse.