They are good sounding calls. Like LKing says, there are alot of great calls out there, and they' re all good calls. Now there are some calls that' ll be easier for you to call with and then there' ll be some calls that you will need lots of practice to get that perfect sound.
There is also alot of calls out there that sound just as good as them High dollar calls, only at a small fraction of the cost. You need to first pick one that is easy for you to blow, and then when you get the perfect technique down, spring for a high dollar acrylic call, Then you' ll look good in your buddies eyes with that fancy, fine looking acrylic.