I had the opportunity to interview with the CSEO team during one of their Interview days. The team was very nice and engaged and I spoke with 4 individuals in 4 different teams under the CSEO's umbrella. Each one had a coding challenge that dealt with different data structures. Although I didn't receive an offer, it was a great opportunity to speak with the team. I had a wonderful recruiter helping through the process (I will say, some of the recruiters are a hit or miss, hopefully you get a good responsive individual!).