Some LAQ really do work miracles. But I would be willing to bet serious money that some quilts are much easier to work on because they lay flat and "square" and are prepared well - and others are in the "oh, my" category.
I think the questions really are:
What can I do with my quilt top and bottom to make it easier for a LAQ do a good job on it?
Are there some things that are difficult to work out in the quilting process?
(Examples:
1)The left border measures 90 inches and is ruffled and the right border measure 80 inches and is laying flat
2)The stitching on a piano key border is coming out
3) Skimpy seams that pull out when the top is stretched out)
Is there a quilt top that is "impossible" to quilt and have it come out looking nice?
I am not a LAQ - but it seems reasonable to me that having a top that lays flat and and is well prepared would be ever so much easier to work on. Well prepared - it has been pressed, stray threads on the back have been trimmed, no open seams, etc, etc.
An analogy: If you were a carpenter - would you prefer to work with straight boards or warped boards?