My first was a Korg DT-1 that a won years ago. Years later I bought a Korg AW-1. A good and accurate tool with piezo AND microphone but unfortunately our child broke the clip. So I changed to the old Peterson. It's a very good tuner, tuning is not so quick, but - as I think - more exact, especially when playing in a guitar orchestra. I compared it with the tool of our piano dealer, the peterson showed exactly the same results.
For a second instrument I bought a cheap (10€) "Stanford" tuner. Good display but not so accurate as the Peterson, especially not in the bass strings / with a bass. This tuner broke and I replaced it by a new Snark. It's ok too, also for the bass, but the Peterson will be my favourite in this moment. (I will try the Polytune, the Korg Sledgehammer and the new Peterson.)