Product review (5 stars): Most reviews here are from a different product or else some sellers are shipping different items.  "READ review"
First thing is many of the reviews are from older or different products as this LDR 509 5100 kit DOES NOT have all the parts attached.  So you CAN easily cut it to whatever length you need.  The saddle valve easily will pierce 1/2 copper without leaking and it even acts as a shutoff valve so you don't need to install a separate one.  The people having the leaking and other problems are not reading the instructions as you CAN NOT use the copper pieces with the compression nut or it will leak, you MUST use the plastic pieces then it will not leak.