the biggest thing with the sexed is the timing, you wait until 18 hours instead of 12.
best way to describe the reason is, conventional has a shell on the sperm that takes 6 hours to shed, with the sexed the shield is already off.
I get along just fine with it.
if you get confident in using it, could be a money maker, what would all steer calves be worth to the commercial guy? with that know it isn't 100% accurate sometimes the other sex will show up.