Everything went smoothly from unpacking the unit to setting the real time clock after the install. The instructions and templates were spot on and easy to understand. I did take an extra step and watch a few DIY videos on OTR microwaves before I tried it live. Make sure you have the right tools including a stud finder as it makes the job that much easier. The unit is great and heats stuff better, quicker than the one I replaced. Love the LED lights and door handle.