Petr Cech leaves Chelsea to join Arsenal. How do you Chelsea fans feel about it?

Ex-Chelsea goalkeeper Petr Cech, 33, announced this afternoon that he's signed with Arsenal after leaving Chelsea. The Czech Republic international reportedly signed a 4-year-deal with the Gunners worth around £11m. How do you Chelsea fans feel about this move? (He's the number trending topic in Nigeria so me sef join the train...lol)