Pros
Qualtrics has a great product, good food and they offer good employee perks like pool tables, ping pong, etc. They have grown their business on cheap labor which is one of the key reasons they are financially sound. Leadership is OK. Could be better. The employees and your peers at Qualtrics are awesome. That was my favorite part of working at Qualtrics where the people I was able to work with.
Cons
If you weren't in early on, there is a great chance you wouldn't be going up the chain very fast and won't make very much money unless one of the owners has some interest in you. Be prepared to drink the kool-aid from management that everyone will make a lot of money, that you can't be successful unless you are Qualtrics, everyone will be millionaires, etc. If you get on the core leaderships side and they like you, you will get lots of perks.