My experience with Samsung has not been great.
A LCD TV had 2 separate issues - 1 resulted in Samsung sending someone to fix it because of how widespread it was (think they got sued for it), and another required a solution that we found on the web. Both of these probably happened within 3 years of purchase. With the fixes it's still running strong though (8+ years now)
A fridge that we inherited from the prior owners of our house had an issue that means that it stops cooling after about 12 hours, unless the unit is unplugged and replugged in (I guess the plug being easily accessible gave away that the prior people were probably using that method to keep it going). It was out of warranty, but thankfully I was able to get it fixed by replacing a few parts myself. After the fix, it is functioning well.
So overall their stuff works and can last a long time, but certain bad components in their products seem to be a recurring theme. It's definitely a brand that I tend to avoid when making new purchases.