KnitPicks.com sells an innovative NEW interchangeable needle set, called "OPTIONS"...and it is all the rage! The price is unbelievably low!
Looking into some of the topics in General Knitting (here at KnittingHelpForum)...the knitters are all a-buzz and ECSTATIC over them! Me, too! Here is a link to the OPTIONS
The tips of ALL SIZES of needles are pointier than Addi's, therefore, they are more precise for intricate stitch manipulations like cables, bobbles, decreases of all kinds, etc. Also great for knitting with 2 strands. They are less apt to "miss" one of the strands.