Product review (5 stars): Very easy to do if you are handy enough
My freezer was having defrost issues. Usually systems is you temps are rising for both fridge and freezer. You will see build up of ice in the back of the freezer. After watching a bunch of youtube vids to determine the issue, i bought this and a heater/lamp to fix the issue.

Very easy to do if you are handy enough. Recommend doing it when the freezer is empty since you have to unplug it and open the freezer to let the ice in the back to melt. You can use a heatgun or hair dryer(takes much much longer) to melt the ice if you want to do it quickly.

Once all the ice is gone, very easy to replace.