This little box does not appear very strong, but ultimately it proves reliable over time and that's all you asked!
No lizard, it gives ...
on the other hand, beware! I was shocked to grant Korg guitar on this and other software on a tuner, record catches, and then noticed that there were few percent shift, quite annoying in the end. But I do not really know which of the two was right. I never felt, otherwise the Korg was false.
Moral: do always use a single tuner!