Feature:
This tuner is now 8 years old and has never given me any problems. The tuning is perfect. I dopped it 100 times with no problems noted. Battery life exceeds a year and I use it every day. This is a reasonably priced workhorse that will totally satisfy you unless you do a lot of alternative tunings.

Quality:
It still looks as good as the day i bought it.

Desirability:
Practical and necessary accessory for any guitar player.

Sound:
see below

Support:
Never needed support.

Feature:
automatically selects note for string that's being tuned. Has input and output jacks

Quality:
Very good

Value:
Can't beat it for the price

Desirability:
It was given as a gift, but it was better than the tuner I had

Sound:
N/A

Support:
Don't know

Overall:
Basically a very good inexpensive tuner. It works very well with acoustic guitar, but I seem to have problems getting my electric in tune, but maybe my electric guitar is the problem.

Feature:
It is small enough to be taken anywhere and takes up very little space on pedalboards. Faster and better pitch/LED response would be great. The LEDs wonders quite a bit.

Quality:
While the tuner being plastic, overall build of the tuner is good.

Value:
I would recommend springing for a tuner with a better spec. Korg makes other tuners that are much better in every aspect.

Desirability:
Why would anyone want something that's marginal? The answer is "nobody".

Sound:
It doesn't make any sound of its own but the bypass will alter the original sound greatly in a negative manner.

Ease of Use:
LED/pitch response is rather sluggish and needs certain amount of patience to get instruments in tune with this tuner. I recall the official spec of +/- 3 cents accuracy and combine that with the built in margin of LEDs, instrument may be quite a bit out of tune if one is not careful.

Support:
Sluggish e-mail response.

Overall:
I have a couple of other tuners and I only use this one as an emergency back up. Needless to say, I'm shopping for a better back up than this one. GT-3 is quite disappointing.

so easy to use. just turn it on.I have it for 4years and still works although Im not friendly with my stuff

Overall:
Works ok with a guitar plugged in but the mic doesn't work that great with acoustic guitars or mandolins.