I was careful w/ calibrations, tried for months, spoke w/ people at the company, etc etc...it just wasn't worth the effort for me. Maybe they're better now, haven't tried in about 3 years.
That was the final straw for me, but the effort around these CGMs is also not to be understated. Calibrations, extra items to lug around attached to your body, extra pieces that can break / not work, etc etc. Anything that helps with this is huge.
When I think of the big picture I realize that Type I Diabetes is nothing compared to the health issues many people deal with, and I consider myself _extremely_ lucky. That being said, it's a daily battle that you never, ever get a break from. Personally, the CGMs didn't make the battle (or my results) much better.
Who knows if this technology would be any better, but I can cross my fingers. I would gladly pay almost all spare money I have for a CGM guaranteed to be both accurate (keep me healthy) and reliable/simple (keep me sane).