I was looking for more space and extra speed. Plus my old drive was close to 5 years old and had a problem with the drive mapping. So I had to restore from backup.
I did my homework so it seemed that I was prepared. The kit had everything in it that I needed. I used superduper to clone. Everything went well and the drive works great.
Do your homework before you start, don't get in a hurry and in just a couple of hours it's all done.