Sony HT-A9 Home Theater System review

I have installed my Sony HT-A9 Home Theater System + Sony SA-SW5 7.1" 300 Wireless Subwoofer. I have purchased this system to use with my Sony A90J TV which looks like the HT-A9 system stability and reliability is not good.

The system does not keep wireless connection for the Front Left Speaker. I have restarted the whole system several times and all the firmwares are updated.
I will for another week to see if there is any software update come out and fix the system failure, then I will return it