The calculator is rather convenient. Like him personally layout to something more than comparable models casio, but in the functions they must not differ. Quite class I find that it can even solve systems of equations, super thing! Qualitatively, the computer is fine. Very light but stable. The only thing I did not like at the beginning, was the soft pressure point of the keys. That was a bit crisper and more pleasant at my previous Sharp. Otherwise supercomputer, highly recommended.