Regarding my experience with Cisco support for firewalls, we are using TAC support and partner support from Cisco. The experience is generally fine, but there is one area where we consistently face problems. Whenever we open a case, for example a P1 (severity one) case, an L2 engineer initially takes time to understand the requirement. Then the engineer mentions that their shift is going to finish and hands over to a new engineer, who takes additional time to get up to speed. This approach is not workable in our environment, especially in banking, where uptime is critical. This area requires improvement.