The Crossover is a high-end instrument. It features state of the art covers, top quality reed plates and a fully sealed bamboo laminate comb which is almost completely water resistant. In addition, the screw together assembly makes servicing the harmonica much easier. I play it myself, both on stage and when recording. Basically you get what you pay for.
With the high notes you need to take your time and learn to use less air but slightly more pressure (the small reeds are stiffer). It really helps to breathe from the diaphragm and relax.