I use it a lot, and have been for 10 years or so. I have never had any sort of error. It has simply always worked exactly like it's supposed to.

I don't know anything about it being intrusive or insecure, and definately need a source on that, but it's possible those criticisms are valid, but again, need a damn source. As is, the person you commented on has lost all cridibilty, so I'm inclined to err on the side of caution, and assume they don't know what they're talking about.