Was a great place to work - small, friendly group, but now part of Blackboard - different company and different culture. Added better benifits and larger company stability but less identity as Xythos. Still possible to work on Xythos inside of Blackboard, either in a dedicated role or split responsibilities. Many Xythos people still there years after acquisition.
Cons
No longer exists as its own entity, part of much larger organization. Get lost in organization that pays less attention to Xythos.
It's a pretty good place to work. They pay well for internship and you have flexible hours. The people are helpful and they are quick to respond when you have problems. The management seems to know what it wants to do though. Little to no bureaucracy at the Xythos level.
Cons
They are just starting the internship program so they don't know what to do yet. I got there near the end of a product cycle so they spent a lot of time working on that instead of helping the interns. They are owned by Blackboard which seems full of bureaucracy.