Bluetooth Intercom

Not sure if this is the right place to post this...

I have three questions for those of you who use Bluetooth intercom:

(1) Have any Cardo Scala Rider users experienced any difficulty upgrading a G9-series device to the latest software? I upgraded and have had real issues. Customer support has helped me resolve several issues, but my device sill still not pair with my phone reliably. They tell me it must be something wrong with my device - but it was working perfectly prior to trying to upgrade. Just curious as to whether any others have had issues.

(2) Has anyone tried the new Cardo PackTalk? It looks like really cool technology - but I'm worried about dropping that amount of money if I'm going to get sketchy support if I have issues.

(3) Should I just switch to the Sena product? The Sena 20S looks like a significant upgrade to Bluetooth 4.0, and it looks like it allows full duplex communication with 8 riders instead of 4, so I'm interested.

Let me know if you guys have any thoughts.