I think that basting might come in handy if you're quilting a large quilt. I tried to quilt a queen sized quilt on my Bernina and it was impossible. I had so many safety pins in it that it weighed a ton. I ended up sending it out to be quilted. If I had just sent it to a longarmer for basting it would have been so much lighter and I probably could have quilted it at home.
As an aside, I used 505 spray basting for the first time a few weeks ago. It was amazing. No smell and it held the layers together really well. I did put a few pins in the border because I gave that area less spray (accidently). It was a little bit bigger than crib size. When I did my mug rugs I used it again and I didn't have to put one pin in. There was no stickiness on my machine or needle. I used old towels to protect my table and there were no problems. It washed out perfectly. On the smaller quilts I will definitely use it again. It was great to move that quilt around without worrying about all the pins.