Feature:
Comes with info on what tensions to use.

Quality:
I am guessing that this is just an adapted lab device. Very high quality

Value:
The ammount of time saved would make it worth while at twice the price.

Sound:
I am a professional drummer with over 40 years experience as well as having excellent pitch (I am a singer and guitarist as well). I thought of myself as having excellent drum tuning skills. I just borrowed this from a friend and WOW!. Last week I spent about three hours retuning a used kit that I picked up and it sounded great, but when a friend of mine said you have to try this thing, I thought why not, there are definitely some overtones that I could still use to get rid of. After about an hour with the Drum Dial, I can say that I never had a kit sound better. I was actually surprised at how well I did on my own getting the head tensions correct, before using the Drum Dial. I was never off by more than five pounds and in most cases not more than a few, but even the minor tension adjustments I made with this thing absulutlely rocked my world. What is more; I can only imagine how much quicker it would have been the first time with the Drum Dial.

Ease of Use:
Very straight forward.

Support:
Wouldn't know, didnt need it and doubt that you ever would