Review (3/5): Just okay.
The only thing that makes this good for traveling is that the tool can do two functions in one, thereby eliminating something you might need to pack. The size, however, is just the same (if not larger) than a standard curling iron or straightener. As for overall effectiveness... I didn't find this tool to be amazing. It heat up quickly, but there doesn't seem to be enough grip to hold my hair (and I don't have particularly fine thin/fine/silky hair). My hair slips out of the tool too easily whether I'm using the curling or straightening function, making it difficult to use. I was actually going to return my straightener/curling iron because of this, but apparently I just missed the return window. What a bummer.