hi-low vs wong's halfs

I have been playing BJ full-time now for about 18 months. Since I play almost exlusively shoes games in AC, I have always used the hi-low count. Although I've had pretty good sucess, I've recently been thinking of trying a level 2 or 3 count to improve my win rate. I've been looking at Wong's halfs. I think I could master this fairly quickly. Does anyone use this count regularly? Is it worth learning a new count for the extra advantage?