Need to get a tuner pedal. What would you recommend?

I'm currently looking at the BOSS TU-2, and am considering cheaper options like polytune. TU-3 is the highest price point I'll go for. Any horror stories with these or others? Really all I need is a pedal that tunes accurately, does true bypass while tuning, and is bright enough to see while playing. via /r/guitarpedals http://ift.tt/2rUayG6