Be careful of those 1/4" feet with guide. Mine for my Babylock is worthless. If you get one, test it by sewing 3 strips together (1 1/2" width) press, then measure with a good ruler. That center strip should measure 1 inch in width consistently up and down the length of the strip.
Those command strips are really neat to help guide the fabric.
Someone on this board told me a while ago to use an index card. those lines are 1/4" apart.
If your seams are coming undone at the ends, are you clipping the threads too close? Also, If it does seam to be a problem for you, you could back stitch at the beginning and end of each seam.
One place that is really good to go to for videos on how to quilt is Missouri Star Quilt Company:
http://quiltingtutorials.com/basic-s...-quarter-inch/
http://quiltingtutorials.com/basic-s...th-fabric-wof/
http://quiltingtutorials.com/product...selvedge-edge/
http://quiltingtutorials.com/browse-...minology-bias/
http://quiltingtutorials.com/basic-s...traight-grain/
http://quiltingtutorials.com/all/bin...ewing-machine/
Have fun browsing through all of MSQC "how to" videos:
http://quiltingtutorials.com/