I just got a Bose Soundlink Mini last Friday and the sound quality blew me away. It's the best computer/bookshelf/portable I've heard, even to the point of comparing it to my 5.1 HT system. Very full sound, amazing bass and percussion impact, full midrange, and nice high end. I've played with several EQ presets, and didn't even bother trying a custom - I just set it to "flat" on all devices (iPhone 5s, iPad Air, and rMBP). It's also very easy to switch between paired devices.
I thought it a bit pricey (though not for Bose), but as reviews have said it easily compares or beats speakers costing much, much more. Well worth $199.
My only complaint is the auto shut off when no audio is being received (30 min.). From what I've read, this is supposed to only happen when on battery only, but occurs when on a/c also. Hopefully, something that can be addressed in a firmware update.