Salary appears to be average or a little lagging behind competitors. All the amenities and benefits should be considered when looking at SAS's compensation, but if your only goal is to earn a lot and you don't care how you are treated SAS might not be right for you.
The biggest downside to salary is that raises are sparse and small. I did not get any raise after my first year. The next year I got a nice 8% bump, but most of my peers only got around 2%. That seems to be the average unless you get a large promotion which generally take several years to achieve. I would warn people to only come to SAS if you are happy with the starting salary, don't expect drastic raises.
Vacation time is also just OK. You get 16 days per year, which increases to 21 days after you have been at SAS for 10 years. You do thankfully get the week from Christmas to New Years off, so really I'd compare the vacation time to 20 days at most companies. I would love to see that threshold for more vacation brought down, maybe increasing a day per year up to a maximum of 25 or something like that.
One downside to the culture and having your own office is that you can be socially isolated very easily. People stay at SAS a long time and the average age is probably in the mid-40s. So, as a young professional it can be hard to make workplace friends. Also the majority of meetings happen online so you sit in your office most of the time without seeing anyone face to face.
Without getting too technical, I also believe SAS's core technology is lagging behind competitors and even open source options. Management has been preaching the transition to cloud for years, but our offerings still seem half baked and difficult to manage. There is so much legacy code at SAS that they are trying to support that it seems like we can not move forward into the modern age of cloud and containers. SAS's strength is really in niche areas that they have developed specific solutions within. They also have a lot of long time clients that have used SAS since they were top dogs in the analytics space 20 years ago. I don't think SAS is in a death spiral or anything, but growth will be hard to come by in the future.