Ventajas
If you have many certifications, you'll have plenty of work to do. Certification pay bumps and bonuses are clear, without question. The company events were fun, but the worthwhile ones varied by whoever was the department manager at that time. Taking PTO was easy, though many were not allowed to go into the negative. Managers were generally friendly and easy to get information from, in person. Pay seemed comparable to other firms.
Desventajas
If you're low on the totem pole, you'll be subjected to overnight and early morning shifts more frequently. It's difficult to get access to training materials for certifications-- I had to do a lot of legwork on my own time to get what I needed. Getting title changes and promotions were difficult from within. Benefits were not great most of the time I worked here ($5k+ deductible); it got slightly better ($1.7k deductible) shortly before I left. Management is hard to get a hold of via phone and text.