I am using 0.5mm pitch DFN 3x3mm with stencils and it works well. For this pitch, metal stencils are better of plastic (e.g. those oshstencils.com because the cuts have better definition.
Even if you get bridges it's not the end of the world for small batches and you can fix them manually. Get a good *tacky* flux (e.g. ChipQuik), small solder tip (I am using a Metcal micro hoof SMTC1174), an optical stereo microscope (a $300 cheapo from ebay should do, light ring is a must), and a narrow good quality wick. Put flux generously, clean your tip, and under the microscope either use the wick or just drag the tip. I am far from being a soldering expert but with this setup it's pretty easy.
Also, when yo design your PCB, if the package does not have leads coming out (e.g. DFN), extend the exposed pads on the outer side so you can form a heat bridge with the soldering iron.