We are having some great fun with this. Has handled some equations really well. Having trouble with distinguishing 5 and 2 and visa versa. Overall great. Showed a friend who is an ipohone fanatic and he just grunted that it was good (even better when I paid less than his). Had some trouble with some more scientific functions. Also a drop menu with simple financial and scientific equations (maybe just fill in areas would be great) examples would be loan repayments etc (I come from a financial background but can see many using these functions as many would not know how to calculate these)