I used the RV Bits fairings and have no bad behavior at all. This is interesting to me because when I went down to Houston for transition training with Bruce Bohannon, he had strakes on his RV-8 and swore that they mitigated some sort of airflow disruption when he was close to stall causing a slight momentary "swerve" (best word I can come up with at the moment). I never noticed it probably because my own bad technique was worse than the "swerve". Randy Lervold also wrote about this on his site and Mike Robbins put some on his plane as I recall.
All I know is that my plane is extremely docile on the stall with no weird behavior at all. I can sit there power off with the stick in my gut and it just bobs up and down as I lose 1000 fpm.
RV-8 #81077 Super Slow Build
Titan IOX-370, Dual P-Mags, AFP FM200A FI, Sensenich GA Prop
First Flight 11/20/2016