Pros
The most positive aspect of working at Micron is that the Semiconductor Manufacturing Industry is an interesting work environment for all disciplines of engineering. There is a large variety of systems and processes which require curious technical people to maintain, troubleshoot and upgrade. Memory chip technology improves every 12 months so change is constant. If you like change, you will love it.
Cons
Despite their superficial efforts, Management has never been able to make people feel valued. Sure, they love to say "people are our most valuable resource" but don't demonstrate it. Everyone working at Micron knows that the factories, processing machines, and raw materials cost billions and are really the most valuable assets. To make things worse, Micron has adopted a forced-ranking performance management system that forces managers to use the full distribution of ratings (1 through 5) during yearly performance reviews. This is like the old GE system of terminating 10% of the workforce every year to create turnover. There are many experienced and talented employees at Micron and some groups are mostly comprised of these types. This forces managers of those groups to artificially rate people high and low. This leads to employees distrusting the process and Management and reduces collaboration due to internal team competition. Please note that Micron Top Management would claim that what I'm saying about the forced-ranking is not true, but I've talked with a number of mid-level managers, off the record, and they've confirmed it.