Here is a quick breakdown of the sires and class placing from the owned heifers at NJAS. For example Lookout sired 4 first place heifers, 4 seconds, etc.
Here is an excellent resource to determine if sexed semen is right for your individual cattle operation: http://documents.crinet.com/Genex-Cooperative-Inc/Beef/GenChoiceBeefQuickMath.pdf
While I cannot add personal experience, the stats certainly indicate he is a very reliable calving ease sire. He has lead the Genex/CRi cooperative in semen sales for 4 straight years. The resulting thousands of calves have generated him a BW epd of -1.0 (top 5% of the breed) and a .96 accuracy...