It is internally the same as the Livia 90, but cheaper. It has typical semi-commercial machine heavy-duty construction and operation.  It's made to leave on all day.

The machine has a smaller drip tray than some, but it's adequate.  The cup warmer doesn't work well unless you remove the tray which makes the machine a little less attractive.

I wrote this review for those who are looking into getting a BZ99, but don't know what it is.  If you want more information, look at the reviews for the Livia 90, because internally the machines are identical.  Bezzera manufacturers the Livia 90 also.  The BZ99 is no longer made as Bezzera now manufactures the BZ02.  

The machine is a semi-commercial, semi-automatic, pour-over with a heat exchanger (HEX) boiler.  It has low water sensors in the boiler and reservoir, both of which will shut the machine down for low levels.  The boiler is large enough to brew and steam at the same time if you’re so inclined.  Dimensions: approximately 12W-15D-13H in inches.  When the reservoir cover is full open, the height is 18.25”. Features are 58mm commercial style portafilter, 1.5 liter boiler, Passive cup warmer, 1300W heating element, boiler pressure gauge, & 3.5 liter reservoir.  Commercial type 3-way valve allows the machine to be back flushed.

There are a few negatives to this machine, but I have yet to see any machine that is perfect at any price range.  The drip tray is a bit small, but adequate.  The machine is noisier than some, but not too bad.  Steaming is a bit weak, but let me put this in perspective.  Compared to a large commercial machine, it’s very weak, but these machines have boilers which would be too big for a home machine for most people.  Compared even to a high-end consumer machine like the Rancilio Silvia, the steaming ability rocks.  With practice, the machine will produce up to about 12 oz of micro-foam which is adequate.

Espresso quality is as you would expect in a semi-commercial machine.  The grouphead and portafilter are fully commercial type and much heavier than any consumer machine.  Brew temp is variable via an internal adjustment.  Controls are simple consisting of an on-off button, a latching brew button, a steam knob, and a hot water knob.  It has one light which tells you when the heating element is active and a green light that goes out if the reservoir or boiler runs low and the machine has shut itself down.  The steam and hot water arms are separate. It will produce almost 2 cups of very hot water on demand.  I use the hot water so often for things coffee and non coffee related, I simply would not own a machine without this ability.

I bought mine used for a good price and would do it again.  These machines sold new for about $895.  For that price I would buy something else, but if you can get a good deal on one of these they are nice.