Product review (5 stars): You don't need a plumber
I thought this would be much more difficult than it was.  This kit is very easy, 1st turn off the water before you start, just make sure you polish the pipe so it is smooth before installing the kit or you might have a leak later.  I recommend using nu shine to polish the pipe.  Also make sure you put the bolts on tightly that clamp onto the pipe.  The kit comes with extra parts in case you drop something on the floor and loose it like I did.  The kit shouldn't require teflon tape, just make sure everything is on tight.  The kit took 15 minutes to install still works great a couple months later.  Always throw the first few sets of ice cubes away.