I've done it a few times. My first were Apple iBooks (2.5" PATA), and the process was just so convoluted that I never tried.
My 2007 MacBook was pretty easy. It's tucked inside a slot with a drive/memory shield covering it. It does have a "sled" that uses T8 mounting screws, but other than that it's pretty easy. The only issue is that it is kind of loose sometimes and I've heard of the drive disconnecting. My mid-2012 MacBook Pro is also pretty easy, only requiring a T6 Torx driver for the mounting screws and a #00 Phillips screwdriver to remove the cover and mounting bracket. All of those could handle any reasonable size drive from 7-9.5 mm.
My wife bought a Lenovo T series refurb once. Once the drive was corrupted and just transferred over a WD Black 7200 RPM drive that I had previously bought when my Mac's drive was corrupted. But that was 9.5mm and had to be since it installed with these "bumpers" that had to fit snug with a 9.5mm drive. I guess it would have needed some sort of shim to work with 7mm, especially an SSD. I haven't seen one that came in a 9.5mm case.
My 2007 MacBook was pretty easy. It's tucked inside a slot with a drive/memory shield covering it. It does have a "sled" that uses T8 mounting screws, but other than that it's pretty easy. The only issue is that it is kind of loose sometimes and I've heard of the drive disconnecting. My mid-2012 MacBook Pro is also pretty easy, only requiring a T6 Torx driver for the mounting screws and a #00 Phillips screwdriver to remove the cover and mounting bracket. All of those could handle any reasonable size drive from 7-9.5 mm.
My wife bought a Lenovo T series refurb once. Once the drive was corrupted and just transferred over a WD Black 7200 RPM drive that I had previously bought when my Mac's drive was corrupted. But that was 9.5mm and had to be since it installed with these "bumpers" that had to fit snug with a 9.5mm drive. I guess it would have needed some sort of shim to work with 7mm, especially an SSD. I haven't seen one that came in a 9.5mm case.