I bought the OWC kit for adding an SSD to my 27" iMac. I added a Crucial 512 GB drive from Amazon and it is amazingly fast now.
The whole process took about an hour and if you download the video from OWC and watch it through once, then follow it step by step, it is not hard at all.
Many people mention worrying about removing the glass. That is the easiest part. I had no dust on the inside afterwards. OWC includes a nice microfiber cloth that removes smudges and dust.
The 512GB from Amazon is currently less than $400 and a no brainer.
SSD I used https://www.amazon.com/Crucial-512GB-2-5-Inch-9-5mm-CT512M4SSD2/dp/B004W2JL3Y
The 256GB model is currently $190 https://www.amazon.com/MODEL-Crucial-256GB-2-5-Inch-CT256M4SSD2/dp/B004W2JL2A
OWC kit and video http://eshop.macsales.com/item/OWC/DIYIM27SSD11/
The whole process took about an hour and if you download the video from OWC and watch it through once, then follow it step by step, it is not hard at all.
Many people mention worrying about removing the glass. That is the easiest part. I had no dust on the inside afterwards. OWC includes a nice microfiber cloth that removes smudges and dust.
The 512GB from Amazon is currently less than $400 and a no brainer.
SSD I used https://www.amazon.com/Crucial-512GB-2-5-Inch-9-5mm-CT512M4SSD2/dp/B004W2JL3Y
The 256GB model is currently $190 https://www.amazon.com/MODEL-Crucial-256GB-2-5-Inch-CT256M4SSD2/dp/B004W2JL2A
OWC kit and video http://eshop.macsales.com/item/OWC/DIYIM27SSD11/