Hi,
I've been using a Libre for about 4 months now, and its been a real revelation with info on trends particularly. Because of it I've changed my basal insulin to one with a longer action, and adjusted my carb : insulin ratios, so my control is much better.
I've never had a sensor cause bleeding, but I have had two fail prematurely - the first one because I caught it on the edge of a doorframe and ripped it off - ouch ! The second one failed after a week after I'd spent much of the day in & out of the water at a spa, and water got in. Abbott kindly sent me a replacement promptly, and reasonably asked me to return the failed one postage paid.
I cant agree that the Libre is unreliable, as far as I'm concerned it's a Godsend, albeit that they're not cheap.
Pete Jones