I use Superior bottom line prewound bobbins for my longarm and love them. The tension is perfect and there is a lot of thread on them.

They don't work well in my machine. I save them for hand sewing.

I have used the prewound ones on my Pfaff for years and love the convience of them. I use 100% cotton. Love them.

I also have a Viking and it uses the green bobbins.
No prewound do not work in my machine.

I match my top thread and bobbin thread so I don't think prewounds would work... Unless you can get neutral colors prewound but aren't most of them white or black?

I purchased some plastic bobbins off E-bay... they were sold as being parts for Janome.. but they were just plastic bobbins.. now I know what they were probably from.. the one I purchased them from when I complained gave my money back and did not want the bobbins back... Now I know why..

This is the site that I found and I LOVE the free shipping, and it's the cheapest place I have found.

Anyone find anything cheaper?

You do need to know the size of your bobbins.

http://www.allthreads.com/Prewound_Bobbins.aspx#CQ

I use both poly and cotton all the time for both my pfaff and mega quilter - and they last a lot longer - watch that they are for you sewing machine - I love them! as for price compared to winding I am not sure but saves time and I get more sewing done can do a lot of piecing before changing another bobbin...

I use the Clear Glide bobbins for all my piecing. I have a light tan and a dark tan, and a light grey and a dark grey. That's all I ever use. I love the Clear Glide bobbins because they hold more thread than a wound on my machine bobbin.

I order here a lot for bobbins. They have different color threads too. If you sign up (free) you'll get great special sales especially in quilting items. http://www.shoppersrule.com/c/CSBS/index.html