I delegated the job to my 17 year old son .
He watched a few videos and was able to easily remove and disassemble the oven door, to access the window. I didn't time him, but the entire process took way less time than I expected. The longest part for him was picking out all the minute shards of glass (the corners of the glass had splintered as well as the crack down the middle of the window). Once he had the old glass out it was just a couple of minutes before the new glass was put in and the door reinstalled. I used the oven a few minutes later and everything was just as it was before my ice "incident" of cracking the glass.
I am SO thankful that I could order the replacement piece and that my son could install it. It saved me hundreds of dollars and a huge chunk of time!