Pros
Working at Dexcom gave me an incredible amount of respect and appreciation for my new employer. If anything, working at Dexcom gave an experience I can look back on at any time and say "at least things aren't as bad as they were at Dexcom".
Cons
You will maybe only meet 1 or 2 people actually qualified for their jobs. You will be expected to perform functions way beyond the scope of your job because your direct manager won't have the experience to understand what your job should entail. There are no clear roles and responsibilities. The job description you signed? That means nothing. Everyone is allowed to have an opinion on the product but no one will take responsibility for the outcome of the product. You will be expected to be your own PM, PO, Researcher, Product Designer, and more. Roadmap? What roadmap? Your manager will not mentor you and will not have the ability to help you through any roadblocks in the way. You are on your own. You will (maybe) get one promotion and for years after this be told that you're ungrateful for feeling like you ever deserve more recognition. You will be gaslighted into thinking that all of the product problems are yours to solve and if you only had better skills things wouldn't be such a mess. You will forget that you are a competent, talented individual and your self worth will be demolished.