The coffee itself is great, no complaints. Fast brew time as well. My issues lie in the design and hardware.
To start, there is no beep or sound made when the coffee is finished. My last coffee maker did that, even my mother's $30 coffee maker does that. It's a minor quibble, but I find it a nice touch and I would think fairly easy to implement.
Second, the carafe lip design is such that there is an inner lip that prevents all liquid from truly pouring out. So when you clean it with water and pour the water out, some is always retained in the carafe. I find after I've let it "dry" inverted all day, I still have to shake or dry the residual water out. Pretty lame, IMO.
Third, I think it's rather clumsy that both the carafe lid and the coffee basket holder are separate pieces. My former Cuisinart (and many others) have both pieces integrated into the overall design, no loose pieces to store/keep track of. The way the Bonavita works, you place the basket holder on top of the carafe, brew the coffee, then take the basket holder off the carafe and screw the separate lid on.
Lastly, there is no 'pause-and-serve' feature, FYI. This isn't too big a deal for me, but it should be known.