Having shot the Exergy Blue's in 6.5 CM, 308 and 30-06. Nothing to complain about, dropping whitetail deers at distances of 30-230 meters with runs between 5 and 50 meters with lungshots. Compared with Sako Powerhead II (Barnes TTSX I believe) I kind of seem to prefer these, the drops have been more "consistent" (very subjective judgment). They might be opening up faster or something.
No issues with accuracy either in 3 different rifles. On the other hand, when out hunting pin-point accuracy is not something I care about: sub 1 or 2 MOA doesn't make very much of a difference in the field out to at least some 300 meters as the shooter is probably the weakest point in the equation. At the range sub MOA accuracy is a different issue. But so is my rifle, optics etc.
Price wise they were quite cheap at around 50€ back two years ago, but have risen fast so now you pay some 60€-70€ / box of 20 and depending on caliber.