Great system!
The bluetooth works marvelously, speakers are large enough to put out wonderful sound for the price bracket, and sub is surprisingly more powerpacked then the small form factor would lead you to believe. So far a great product as far as I have seen...
For starters I would like to mention I have owned a lot of Logitech systems (z506, z523, z533, and numerous less expensive models) and must say this system is my favorite of the bunch by far, great sound for the $100-$150 mark; Bluetooth works flawlessly so far.
Only thing I could call a weakness is the power cable and volume adjuster knob are hardwired to sub; so if there is an issue with either of those cables it renders the sub useless.
Definitely NOT a deal breaker by any means; don't be diacouraged by this