I have a miche 10 speed cassette for campagnolo, and I don´t like it. I bought it because I needed some seriously low gears for a couple of big rides in the pyrenees (it´s a 13-28), and while it works OK, it´s not as good as a campy cassette or the mavic one I usually use, and it´s twice the weight (a whopping 450grams!) for the same price as the mavic cassette (about 70 euros IIRC). The sprockets are individual, so cleaning and mixing and matching are easy.
foz