I started with reeves for the sharpness of their colors, and I still use them whenever I can find them. They dry quickly enough and are easy to blend. If you are not using them as watercolors, (ie diluting them) then I suggest using acrylic paint instead, as the thicker the application, the more they can flake.
The reeves products have been around for a very long time and for my part, they always work as I hope.
Feel free to use the Dollar store products for practice and experimentation.