I've read mostly good reviews, but reviews usually don't mention weird bugs that people run into down the line.
That's because the vast and overwhelming percentage of owners are not troubled by weird bugs. But millions of S3's are out there, and out of millions of people there are bound to be some (a small percentage, but still tens of thousands of people, at least) who run into problems with the phone which cause them real annoyance.
And this holds true for pretty much every sophisticated electronic device, not just the Samsung S3.
So, if you've had this phone for a while, please tell me if you'd recommend it.
I've had mine since a couple of weeks after the S3's initial release. I'm quite satisfied with it.
No, it isn't perfect in every detail. No device designed by someone other than myself is going to suit me perfectly in every way. That's just the reality of things - there are thousands of design and feature implementation decisions which go into any such product, and to assume that the good people at Samsung will just happen to make exactly the same decisions as I would in each and every case is a bit of a stretch. But overall, I'm happy with the phone. At least, I don't see any other phone out there which I'd like substantially more than I do my S3. So I figure I'll keep it for another year or so, then see what's out there. Maybe a Samsung S5 will convince me to upgrade. (Not to knock the S4, but at least to me, it's not all that significant an improvement over my current phone.)
As for whether I'd recommend the S3 to you, well, how can I? I have no idea what your needs, priorities, reasonable preferences, or irrational biases are, in terms of a phone. Just because I like a given food, piece of music, or automobile - or phone - doesn't mean you will, too. Personal tastes do vary.
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Michael