I have used the behringer rack tuner for going on 3 years now. 5 string tuned aeadg and it does just fine. Drop c,drop d,standard, tunes them all correctly and in a timely fashion. Hundreds of shows and not a single issue. Is the korg going to work faster, most likely. Better? Its subjective at best. There is no reason not to buy one unless you have the scratch for the korg, then I'd say get the korg. Those are just my experiences however. An honest opinion.