Pros
You learn that previous employers weren't as bad as you thought.
Cons
You CANNOT trust them. They acquired us with the usual spiel about being excited to work together etc. Then communication dried up. Bonuses were delayed with little or no communication, what there was was outright lies. Eventually paid, but they decided to change rules and withhold from some (not me, but...) Then they delayed pay rises, no communication. Then they asked us to elect employee representatives "to communicate important issues from time to time". Day N, election complete. N + 1, you guessed, redundancy! If you are being acquired, get your CV updated. They will lie, pick over the carcass of your once proud happy workplace, and move on to the next victim. Don't say you weren't warned.