It all depends on your attitude towards them. They can be more work to set up initially. If you don’t have the Floyd intonation tool, it takes more time to set up the intonation.
Stringing is more of an effort, too. You clip the ball end off the string and clamp it into the bridge. You do have to be careful when loosening the string clamp at the bridge. If you open it too far, the little clamping blocks can fall out (don’t ask how I know this!).
Just about anything you do with it, other than adjusting the fine tuners, requires an Allen wrench.
So, I do understand peoples’ complaints with them.
But, I’ve found that mine is incredibly stable once set up right. I can drop the bar until the strings go completely slack and the strings will return to perfect pitch.
Of course, as with ALL vibratos, this assumes the strings are done stretching out.