it takes practice---even with a 'quilting machine' you can get 'birds-nests' and eyelash areas----the machine does not quilt a perfect quilt for you-
any machine can be used to quilt beautifully- as long as you have practiced, practiced, practiced and worked out all those things that are part of the learning process
start small (pot holders/placemats) as you get comfortable- and your quilting is as beautiful as you want it to be- move up to a runner, baby quilt...then a bit larger--and a bit larger- until you are quilting large quilts-
we all had to start small and learn-
and even seasoned long-arm quilters at times still have problems with tension-or thread breakage- birds nests-
there is a definite learning curve
and no machine is going to fix it for you...the machine is only as good as you are