I looked at cheaper tuners than this one, and they are available, but the extra 5 or so I paid for this one (about $7.50) was well worth it. There are, of course, more expensive tuners available, but this one is well within the price range of the beginner.
The microphone has a tendency to be a little over-sensitive, however, and this has sometimes led to my 'B' string, particularly, being a little out. This is a niggling little moan though, as you should always check your guitar before playing anyway.
On the whole, I found the DCT-8M incredibly easy to use, and is an absolutely vital piece of kit. Don't rely on pitch pipes - this is far better.
This slim little device is ideal for guitarists of all levels as an affordable way of accurately tuning your guitar.
It is tunable across 8 octaves, with 12 notes per octave, and accurate to within 0.5 cents, and uses a Quartz crystal for extra accuracy. Ideal for electric and acoustic guitars, it plugs directly into the guitar, and features a built-in microphone for acoustic tuning.
Although the DCT-8M has automatic calibration, it is possible for you to adjust this manually, providing an accessory that is infinitely versatile. I also found its extremely long battery life to be useful - I haven't changed mine in nearly 18 months, and it's still working.
A great, affordable tuner all-round.