I picked up a set of Kuretake Gansai Tambi watercolors. I've had my eye on these for a while and finally decided to pick them up from Kinokuniya in NYC. I decided on the 18 color set because I personally prefer a limited palette. They also have smaller and larger color palettes available.
The colors are bright and almost creamy when you touch the water to them. I did notice also that they take slightly longer to dry than traditional watercolors. When the painting dries, it also has a slightly glossy appearance to the surface quality. The set of colors is really cute and even includes a place on the back of the lid to paint a small color chart. I'm going to need much more practice with these, but I do like them a lot so far.
My final opinion is that these seem like a good tool for an advanced artist or illustrator, but not for a beginner. If you're just starting out, I'd save some money and practice with a cheaper set of watercolors. All watercolors are pretty similar and these take a delicate hand because they're very creamy and soft.