I second that emotion. Around Christmas time, I put a couple of sticks of memory to expand my aging Macbook Pro. I went through several rounds with two other manufacturers (including Kensington)with both having problems every time. The first would arbitrarily cause the computer to crash every other day or so, and the second manuf (don't remember which) wouldn't even allow the laptop to boot without crashing halfway through. I was about to give up. Enter Corsair. Actually saw them on sale at a local retailer and figured I'd give them one last try. Got a couple of sticks, popped them in, and haven't had a problem since. They'll definitely be first on the list the next time around.
When I worked in IT in the early 2000s, Crucial never let us down. No idea how many old sticks I replaced over those years with Crucial upgrades....it was a bunch. Haven't followed them as closely over the past 6-8 yrs, but they still seem to be trucking along just fine as a top-tier memory company. Now, I did have a problem with a Crucial SSD a number of years ago...but they replaced it no-questions asked since it happened within warranty.
Corsair, Crucial, G. Skill, Geil, Kingston (Hyper) and Patriot are all tried-n-true MEM companies that have been around. Have used them all at some point, and never a problem. Newer brands that seem to be pretty good are TeamGroup and Ballistix. It's always possible to get a dead stick even with these good brands, but generally speaking I wouldn't buy anything other than these top brands.