Trust me, you WILL. Flying buddy of mine has one on a scratch built zlin 50, there was ST-2300 on it (powerful midrange gurgling deadsticker), then webra 120 (reliable, powerful midrange gurgler) and now 160fx (even more powerful, reliable non midrange gurgler). He bought his 160 used for almost half the price. He never owned an OS before that because of the price tag.
Shortly after he installed it he was so impressed with the engine and the way it run he told me that he was sorry for not buying this engine new right when he built that zlin. I can say that he is enjoying it because of the grin from ear to ear when he flies it.