I was trying to switch from a regular hard drive to a 256GB SSD in my Mac mini,
The repair went excellent, almost no hitches at all.
The guide for this one says "to reassemble, follow these instructions in reverse". There are two things this may not work well for. The hard drive has to slot into two small holes. When taking this out, you do not notice these at all (they are not mentioned) and only discover them when you try to reassemble. The other is the hard drive data cable wants to pop off until you install the wifi antenna. This would be relevant information to include in the guide, as I was worried I did something wrong until I noticed the antenna puts pressure on it to keep it from coming loose once installed.