I've been in a bad accident, so yes the crash response is well worth it when a fast response determines whether you live or die. I also like the notifications when the alarm goes off or charging is interrupted. I also use heavily the remote start and status, monthly reports for electric usage, and WIFI for weak areas. The vehicle recovery also reduces my auto insurance.
This said to each his/her own. You can decide whether it's worth it for you to keep it or not. Personally I'm happy the options are there.
2017 Chevy Volt Premier: (Iridescent Pearl, Safety 1 & 2, ACC, Nav, Ambient Lighting.) "SpaceShip2" on VoltStats
2014 Chevy Volt Premium with Safety 1, leather, & polished wheels (Returned to Ally)