Before buying these I checked the reviews on other sights and the American Amazon and then bought these based on those reviews.
I can now so I am so glad that I did, alike many of the Tuttle Library products I own these are very good.
They're laid out brilliantly, they contain the traditional and simplied characters, pin yin on the back, English meaning and example sentences and/or phrases. On top of that they're not at all expensive.
After buying these I bought the Korean in a Flash v.1 for my Korean studies too! I really can't say enough good things about them.