They make a massive difference. I've put SSDs into our old Dell Latitude E6400s just to see the difference vs a 500GB WD Black HDD. If the laptop didn't look like it was 11 years old then you'd never be able to tell the difference for normal daily tasks. It was faster than a brand new HP Elitebook that came with a HDD. SSDs extended the life of our old i7-2600 desktops that ran CAD programs (replaced them this month because we're moving to all-laptops.)
I use Samsung for my M.2 SSD and Crucial for my normal SATA SSDs at home. At work I use Crucial MX500s since they're OPAL compliant for encryption. Pretty much any name brand is good. There's small differences here and there but if you're not a tech-junkie then it won't matter.
Originally Posted by diyjake
What is a good / reliable SSD drive to get? I have read that Kingston brand seems to crash / fail.