I own the GHD V Sapphire Styler and I am in love with it. It straightens through my medium to fine , puffy curly hair nicely reducing it to a sleek , straight and soft state. The box it comes in is really petty and you usually can purchase the iron as part of a set with another product such as a comb to styling spray, depending on where you get it from. It can be petty expensive but will last you the best part of a decade. The styler is create to curl, wave to straighten your hair and it heats up really fast and glides through your hair magically. However it makes it alittle bit trickier to curl/wave hair because it doesn't have much grip on your hair but usually the straighteners will gain alittle more grip the longer you use them (what I found with my iv styler).
This overpriced iron is good if you have naturally fine, soft or wavy hair. If you have coarse, thick hair it will not do the job, or it will take you several passes. This is not unique to the GHD, this applies to ALL CERAMIC straighteners. The Auto shut off and dual voltage is awesome, but it is not worth it if the iron does not provide sleek, durable straight hair. If you have kinky, unruly, poofy hair go with TItanium, hand down!!
For me, the first and still very best of all ceramic stylers [and my dad is a hairdresser too]. It heats up fast, cools down relatively fast, works wonderfully and lasts a long time. In 11 years, I've bought two such stylers. The first one eventually died after 6 years of daily use, rarely skipping a day, while my second one is still going strong. I have no reason to recommend any other styler but this one. My hair is long and very fine.