Grace majestic quilt frame & pfaff grand quilter with Qbot
 

Can anyone tell me if this worth buying as I really would like to learn to quilt larger quilts and find it difficult to do on DS .the frame measures 10 ft

I have a tin lizzie 18ls that I use the Qbot with. So much easier to stitch designs precisely, and back-tracking - very difficult to do free hand I find. If it's just for your own quilting it's great, however, I wish I had bought better, like the Inteliquilter. More expensive, but does a lot more.
You will also probably need a computer program, to digitise designs and convert any you buy to the qbot format, I haven't used many of the ones that came with it. Have purchased some, but they have to be 'tweaked' to suit.

If I can help more feel free to pm me

Good luck

I just bought a stretch juki with a q bot used for a good deal I think. I haven't used it yet but I figure it will do what I need to finish my quilts. when I get thru the learning on how to use it I am sure I will be happy.