I use some time with my smartphones (last N97, N900, now SGS2) Bluetooth watch MBW-150 and Prada Link, looking in the LiveView meaningful development especially through plugins also expandable.
Immediately after unpacking and connecting to the smartphone I had the same problems that have been described here already often: Permanent disconnections and no more Reconncet possible. However, the announced abruptly with a firmware update. The connection and the software will remain stable and that a whole working day and longer. If the connection times but tears off (because you have to walk far) they can recover quickly by pressing the selection button of the Live View. However, I miss an automatic reconnection as in my other Bluetooth watches. Also I miss an alarm if you look too far removed from its smartphones, so breaks off the connection.
The battery life is reasonably adequate. When I get through a working day, I'm already satisfied. They come loose over two working days on a single charge. And I use the mail plugin and often receive Facebook messages.
To me it is however still not been able to also receive Twitter messages. Neither with the built-in "client" even with a paid plugin. The built-in delivers me only feeds into a search, which was probably still stored on Twitter, that's all.
Apparently supportet SE LiveView probably no longer properly, which is a shame, because the plugin has the neat part potential.