My husband and I are currently attempting to make conrete counters for a bathroom using Cheng's book (which is fabulous, btw). We have very little concrete experience (pouring footings for decks, mostly), but so far, it's not that bad. Our stuff doesn't look exactly like the book and we're having some difficulty with air pockets, but it's very enjoyable. On a scale of 1 to 10, I'd give it a 6 or so. But, it's not that expensive to try and, in the end, you have a truly unique piece of art for your home. Go for it!