Overall this is a very cool clock. I didn't need to adjust anything it tells perfect time so far. The only issue I had was that the first unit was dead on arrival, I bought from an amazon seller and they replaced it promptly with a working one.As someone else said there is a slight noise that it makes as the numbers flip down, but sitting across my office it's barely noticeable and definitely not annoying, and it only happens every 60 seconds. Just a tiny click as they fall down to reveal the numbers behind them.

This clock is very sharp looking and works great. I've had it for nearly a month and the time is still perfect - haven't had to reset it.My only complaint is that it runs quite loud. There's a constant humming, which can be annoying in a quiet room and the smack is a little loud. Other then that it's a great looking clock that I get many compliments on.

Very cool clock. Could be a little more sturdy.

Can hear the motor, but who cares. Love the look, and so do many who see it on my desk.

I dig this clock. Cool looking. Seems well made. Looks great in my office. Is it noisy? Not really. Yes it clicks and hums when the tiles flip. Not that big of a deal for me.

Pro: the price is right, the thing looks nice, and it keeps accurate time. I've had it for weeks now and it seems to have drifted less than a minute.Con, depending on your application: it makes a soft rattling noise. This is only noticeable if I'm sitting right next to it, but I think that would rule it out for bedside use. Normally I'm sitting about 8 feet away from it in my office, and then only the once-a-minute click of the digits flipping over is audible.