Pros
I worked in other places before being part of Lab49 and can honestly say that as a software engineer, the professional development here is significantly faster. By engaging in various projects you become familiar with various technologies, commonly cutting edge, and different business domains. You get to collaborate with senior stakeholders on the client side and understand their perspective. You also adopt a commercial mindset, that makes you very marketable. Most importantly, the people are passionate about technology and quality. There is a sense of pride of ownership, which forms a healthy atmosphere. Junior and senior engineers collaborate on a daily basis, and you keep learning new, better ways to implement tasks..
Cons
Communication from upper management in ION Group is spotty. Being a consultant does not fit every engineer. Fragmentation can be an issue.