I use the Snark exclusively for bass. Granted, intonation is a little less critical on bass, but it works well regardless. The Snark isn't perfect, but if you listen in conjunction with it (which I would argue you should anyway), you can get pretty close.

So yeah, I agree with Robert. And while a clip-on tuner likely won't be as good as a Turbo Tuner, the advantages of it outweigh the disadvantages for me. Tuning and blocking the display has never been an issue, but I see what you mean.