Product review (4 stars): All you need is a screw driver and an instructional video to save some money with this product
I watched a few online videos and decided to try replacing this myself. The price of this item was lower that what I found locally, and I saved a bunch of money I would have spent for a service call. All that was needed was a screw driver and  needle nose pliers to remove the small clips that clamp the water lines to the unit. As others have stated, don't discard those clips when you remove the old unit because you need to reuse them to install the new unit. All but one of the water lines were easy enough to reattach - the difficult one being one near the rear of the unit that doesn't offer much slack - a fault of the refrigerator maker, not the maker of this unit. The rear electrical connectors were slightly different making the connections a bit trickier to reattach in the small space you have to work with. Just be careful to mark the electrical and water line connections so you can get them all back in the same positions.