I'm fairly new to quilting and love to spray baste! I tried the other brands mentioned here, but 505 is the best, IMHO. When I complained to the shop owner where I bought my machine about the "gunked up" needle, she said I was using too much spray. I used less the next time and problem solved! In a quilt class I was taking, the instructor taught us to spray baste. It is much easier if 2 people do it, so I put my quilt on tables covered with an old tablecloth, DH and I work together to work from the center and move out. The 505 is very forgiving and it's easy to move if you have a bump or wrinkle. The instructor told us to use our largest ruler's edge for smoothing, but I like my hands. One big item- NEVER spray the fabric! Always spray the batting- don't know exactly way but it does work better!