Ventajas
It's a great place to work. You can learn a lot (though some of the technology is used only in-house and doesn't add much value to your resumè). Development processes and practices are well structured and organnized. There's plenty of room to grow as a good part of the team is comprised of Junior people and promotions happen regularly. Payments and benefits are good (not great, see the 'cons' section).
Desventajas
The relationship with employees is not always clear and open, starting with the offer letter presented to candidates. Benefits are described in vague terms, as an example, the letter mentions a 5% company match for the retirement plan. However, that money becomes yours only if you stay at least five years with the company. Even if you resign in good terms with the company (to got to work with the company business partner) or if you are laid of before 5 years, that money match will be completely withdrawn. Even after 5 years you only secure half of that money. You need to stay for 10 years until you can claim it whole. These details are never mentioned before, not even after, you accept the offer. You only learn it if you care to read the fine print in the retirement plan terms, or when you notice that money is gone from your retirement account after you have already left.