Everything pertains to aviation:
First: You are brought in with basically zero training. Garmin uses a variety of homebrewed tools and frameworks, and you'll be expected to learn them all with the very little documentation provided. You can ask your teammates/mentor for help, but they'll be so busy, that it will be hard to aquire time from them. Certain teams work their employees so hard, that you can feel how miserable their lives are with every conversation.
Next, you'll be given asinine requirements from your manager. I tried to partake in some of the social groups at Garmin(as I was new to KC), and my manager harped on me for not being in my chair for ~90% of the work day. I never felt treated like such a child. Personally, I found the work dull and boring. I can't sit in a chair for 9 hours 5-6 days a week without becoming extremely burnt out. You'll hear that term thrown around a lot, by the way. Everyone is talking about burn out. My current job, I have yet to hear one person say burn-out.
Good luck getting promoted. Upward mobility is like winning the lottery in this company. Everyone is to complacent with the 3 promotions they'll receive during their career here. Everyone is complacent with the 1-3% raises you'll get every year. Everyone is complacent with $200 bonus and the $20 gift card to Walmart.
This job has way too much stress to warrant such lack of career development.