Pros
Pretty high standards of competence and skill among employees. Great flexibility, bendable rules, will be amazing for you if you good at self management, no one will breathe in your neck. Some of the projects are very chill and allow you to actually have some personal life. There's an opportunity to jump between projects and try many different stacks, the more technologies you learn, the better opportunities and greater choices of projects you will have. They incentivise and usually pay for your learning. Some of the projects are cutting-edge and complex for the fortune 500 renowned clients. It's probably the shortest way to get a taste of working for "that famous search engine business company" if you are in the eastern Europe. (personally, 50% of my projects were a mismanaged weird mess, 50% - exciting cutting-edge stuff with only very clever and nice people on board from each side) Relocation and business trips opportunities in the normal times are plenty.
Cons
Some of the projects are garbage. But if you are joining one of the big accounts and work on some ML/Big Data infra stuff, you are most certainly fine. I saw A LOT of mismanagement of very talented people. People are the only actual Grid's asset indeed, and some of the world-class, genius engineers I've been working with were clearly underpaid, mistreated, misused, given garbage projects and refused raises despite hitting every possible performance target, being speakers at conferences and very visible in the software engineering community, etc. This is systematic and very disappointing. Of course they leave in frustration and easily get what they deserve elsewhere. And company does literally nothing to stop this, just shrugs the veterans off and hires a dozen of interns/fresh grads. This happened too many times on my watch and I already see this coming for myself. Money issues. Yes, they usually pay above the average at the start in the eastern europe, but they will be extremely reluctant to give you raises as you grow. Negotiating for this will become a challenge. Also travelling allowance for the US trips has been significantly cut last year. Management issues. Your managers will sometimes do questionable things to hit their short-term revenue targets that were apparently set by some top management who live by their long-term "visions" unaware of how things are actually looking on the face of the earth. Therefore layoffs, overtimes, or selling your poor soul to whoever pays tha dolla dolla bill.