Considering the affordable price (£29.95) the Nano Titanium is a HUGE SURPRISE!!
This straightner does the trick and even a little bit more.
I've been using it for 1 week 1/2, and am very please with result.
It straightens my medium thick hair perfectly and holds surprisingly well under reasonable humidity. It is really light, has very long plates (allowing to grab large section of hairs) and leaves my hairs really soft and shiny (the serum I put on my hair might help on that ;) ).
You can add to that a record time to heat up (10-20 seconds) AND to cool down (less than 1min).
It also creates really cute curls thanks to its round edges.
The only thing I noticed is that the plates are really!!! hot when on 205C and even more on 230C. But again, for really thick hair, it must be convenient. The good thing is that, even on those high temperatures the grip stays quite cool and you won't burn your hand. The tip of the straightner is also protected so if you are used to grap the tip of it, you won't burn yourself either.
Personnaly, I use it on 180C and result is perfect!
I am really happy with the Nano Titanium (and am very glad I didn't spent a fortune for it).