Easy to read under all the conditions I have played in. (I haven't tried it in direct sunlight.) It shows you note you're honing in on, and how far off you are in either direction. It seems to track well and quickly.
Occasionally I have to dampen a string and hit it again rather than just keep hitting it, but I have found that to be the case on many tuners.
It works great for me on both guitar and 4 string bass in standard tuning, so I don't have a B string problem.
I wanted another color, but they came at a silly premium as "collectibles". But the LEDs stand out nicely against the Pitchblack in all black.
Since I use a filtered, isolated power supply, I don't use the 9VDC out.
Korg Pitchblack pedal tuner