I quilt on my embroidery machine all of the time. I never use anything but the regular hoops. I never remove my bottom hoop - just move my quilt into the right place, and then insert the inner hoop. I've heard lots of people say the Snap-Hoop and Magna Quilter are not worth the money.
After you have once set your regular hoop to the right tightness, it is not hard to move the quilt and then replace the inner hoop.
Julie