I have Aetna and in the process of getting approved. They are strict as they require 6 months of seeing a nutritionist, a psychotherapy analysis, a health factor, a mandatory info session on the surgery and a BMI of late 30's and higher. I completed the 6 months of nutrition and have Type II Diabetes - just recently found out that I my bad cholesterol is a little on the high side. So, there shouldn't be any reason for them to deny me.
But, yes Aetna and Cigna are two of the most difficult insurance companies out there when it comes to Bariatric surgery. Although, sometimes it really depends on how the contract was negotiated with Aetna and your company and sometimes it doesn't. Good luck to the both of us!