Putting the IKEA in is relatively straightforward. Most of the work has been in demolishing and rebuilding the room. Our home is 67 years old; a newer home might not need as much prep prior to putting the IKEA in.
Ran into a snag last night. I did my own design for the sink cabinet and it turns out all the parts don't go together. I have a couple of ways I can go forward but I've decided to wait until the sink is fully installed to decide, instead of guessing where the disposal and drain pipes will be.