May in Jersey

I usually do my own quilting on baby or lap size quilts, mostly Stitch in the Ditch. Last year I made a few twin to queen quilts that I had quilted a local longarm quilter. They were a bit too much for me to handle on my machine. I also wanted a nice meander stitch on them as they were special quilts for my DGranddaughters who were getting married or their own houses. Each time I left a quilt with her she asked when I wanted it I replied 4 weeks/a month. She said she'd call me when the quilt was done. Each time I let about 6 weeks pass without hearing from her so I called her and again she asked when did I need the quilt. I mentioned that my receipt said 4 weeks and she had the quilt for me in about another week. First time I thought oh well she got busy but when it happend again with the next two quilts I was very disappointed because the quilts weren't finished when I wanted to gift them. I love her work as the stitching is very good, the quilts lie very flat and since we're guild members her pricing is very affordable. I'd like to use her again but want to handle the turnaround time up front but need to hear from others if I'm expecting too much by requesting a month for turnout time. I'm open to any ideas how to handle this. May in Jersey