A ya or nay on the CS interview depends on weather or not you know your whether
We work a set schedule less than 6 months per year, no communiting, near new airplanes, and a fun group to work with.
Currently the company is having better than expected luck retiring the CJ1 and Bravo fleets. This has created an over staffed situation with little hiring. Maybe only 20 this year.
If you want the job bug them until they offer you an interview.
If you do receive a call from HR think customer service B4 your flying skills.

GOOD LUCK