I've never tried SID.....too scared :-) I think everyones work looks better than mine,but long ago I decided so what.Piecing quilt tops is a fun,relaxing thing for me.My work isn't perfect,not even near,but that's ok.
I admire others work,but still enjoy my own.We're all in it together.
BTW.....if you want to practice lines.....use plaid or patterned fabric with lines.