Feature:
The sound isolation on these phones is great. Approximately 30 db of sound isolation makes these perfect for even loud drummers. Being able to play along to a click or tracks without blasting your head off is great. Every drummer needs something like this. But the metronome is just as barebones as you can get: combo volume on/off dial and tempo dial. That's it. One dry hollow 'click' sound. And like someone else said, the numbers aren't accurate. So you'll have to estimate w/ a reference recording or go by feel.

Quality:
Quality of speakers and metronome is nothing to write home about. However, the construction is VERY rugged, mostly made from off-the-shelf parts, making replacement a simple trip to the hardware store.

Sound:
Don't expect studio or audiophile quality sound with these puppies. They're decent, and get the job done.

Overall:
Great product and unique. Pretty much the ONLY cost-effective solution for drummers looking to be able to hear a metronome or music to play along to.

Feature:
Great drumming features. I use with a pad, kit and electric kit. It has a quality line in feature, and is usually better than the metronome on the electric kit.

Quality:
Solid product, super indestructable. Can be slightly uncomfortable after wearing for a couple hours though.

Value:
great purchase

Sound:
Good click, loud enough to get above drum kit practice. Not so good when playing with a band though.

Ease of Use:
super simple. adjustable, but locks to fitting. simple volume adjustment and speed control.

Support:
n/a

Sound:
mediocre

Overall:
My impression: Would not buy them in retrospect. Very tight grip on your head ... Regular isolation headphones are more comfortable since they wrap your entire ear; these do not, they are very flat, and rely on the slim cushions to do the job of wrapping around your ear. They require considerable pressure on your head in order to achieve good isolation. The price is not cheap; looking back I would get the Vic Firth. So-so stereo sound quality.

Quality:
Very sturdy, but incredibly uncomfortable; I couldn't wear it for more than a few minutes.

Value:
Not worth the price at all. VicFirth makes isolations headphones that work the same, but are almost as comfortable as most closed studio headphones.

Sound:
Sounds fine; though I wasn't able to wear them long enough to make a very imformed decision.

Overall:
I bought Vic Firth's headphones two days later for cheaper at a local music store. These are a good idea, but prohibitively uncomfortable.