Some kits have precut pieces some don't. All precut is easier, you can just focus on your piecing skills.
Kits that don't have precut pieces may be more difficult than following a pattern and cutting your own.
You have to make sure and cut them precisely, as some don't give you hardly any extra fabric. If you cut against the width instead of length, you may run out of fabric. :wink:
It is a personal preference, I enjoy kits if the price is right :D:D:D