According to a friend, the most recent version of Sparrow is essentially broken (100% CPU and crashes). I haven't upgraded in a while for this reason, and I'm not expecting that issue to be fixed, ever.
That said, I'm still using Sparrow on my laptop and desktop machines as well as my iPhone. But probably not for a whole lot longer.
That said, I'm still using Sparrow on my laptop and desktop machines as well as my iPhone. But probably not for a whole lot longer.