The dog is at ease once you decide they are going to have their nails trimmed no matter what and they are going to sit there and take it. They don't have to like it, but they have to be good about it.
I, personally, think the dremel is easier on the nail than a clipper because the clipper squeezes the nail as it cuts, which isn't comfortable. You are also committed to the clip once started and can't back off if it's too close. The dremel is easier on the nail and a heck of a lot faster, but it's noisy and real easy to take some of your skin off if you let your dog wiggle. The faster you finish the nails, the less time they have to think about how they are dying, and the faster they get to the party when you finish.
Elaine and the herd