Zebra came out at just the right time with the perfect blend of features, IMHO. And to be frank, at the time it appeared, it had no comparisons. None. Couple that with industry-wide praise (let's be honest, once you score Hanz f'ing Zimmer as a fan and get your instrument used in blockbuster films), and you've made an impact. And yeah, Howard Scarr is a genius patch designer.
That said, yeah - I feel the GUI/UX could use a tad bit of modernizing and refreshing, but what else do you do at this point?
