Per plans static systems on all three of our RV's - zero issues, zero problems, and as accurate as can be measured. Cost is a few cents for the rivets, and a little more for teh aquarium tubing.
I have read literally hundreds of threads here on VAF of folks that wanted to use more sophisticated, prettier, and more expensive systems - most of which then had all sorts of issues with inaccuracy.
The only thing you want out of a static system is for it to work, and be low maintenance - after that, its just throwing money and time away. Airframe designers spend a surprising amount of test flight time finding accurate static port designs and locations - why duplicate the effort when its already been done?
There are FAR more interesting ways of throwing money at airplanes....
Paul F. Dye
Editor in Chief - KITPLANES Magazine
RV-8 - N188PD
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)