Their MX500 series SSDs were just king of price, performance and reliability. I even installed them in industrial PCs with intense vibrations and large temperature cycles, they're still chugging along like it's nothing.
Sadly, the MX500 is now difficult to find in western europe. Only lower grade BX500, still quite reliable but not as fast as the MX500 with cache + DRAM.
Had quite a lot of controller issues (become sluggish for periods of time) with the sandisk/WD ones like green/blue and SSD plus.
Just that I would not really compare the two. The BX500 is the only Crucial SSD I've ever had troubles with and kinda eroded my trust in the brand. My >10 years old M4 is still working like a champ, so does my MX200.
DRAM-less SSDs are a plague that is very hard to avoid, as it's never mentioned in the spec sheets.