A vast improvement on other clip-ons which particularly don't seem to like to register the lower strings. I have tried a lot of clip-ons and once 'tuned' they may have been accurate (but I now doubt it) but all needed to be tempered afterwards to get them to sound right... the 'sweetened' setting on the Peterson gets it right first time. Open tunings also sound perfectly intonated. Accuracy may be one thing but it's fair to say I was staggered at the tempered sound achieved without any fiddling about.
The strobe display seems a bit alien if you are used to a needle display but only takes 5 minutes to become familiar. You need to be a lot gentler / finer with the
machine-heads than with other clip-ons which simply proves the difference in accuracy.
On the downside, the subsidiary menu display information is very small and in a very fine typeface which means I still have to put my glasses on to select the appropriate module, although the actual strobe reading is large and very easy.
I also dislike the 'chrome' finish which to me looks cheap and stands out if you want to leave it on the headstock at a session but that is purely personal and may not be an issue for anybody else.
OK, it's twice the price of a 'standard' clip-on but after 10 minutes of use I have absolutely no regrets as the performance is superb and I am trading off the extra cost against the wasted time and aggravation I have previously experienced.