Finance student here. It as been helpful in the classes that require the use of this specific calculator. It took a bit of getting used too just from a cash flows perspective, but all other functions are easy enough to learn, given that the professors were all familiar with the programming and were able to help students work though problems.
--For I/Y do NOT enter the function as a decimal. For example, if the interest rate is 8% enter it as 8, NOT .08.
--For Cash flows make sure the press enter after every outflow and inflow. (enter outflows as a negative number)
--Also for entering values, type in the number first and then press the button you want to apply the number to. For example, if you are finding the FV for some loan, and the PV is 1,000. Type 1000 first and then press PV. Then if there are annual payments for 5 years type 5 THEN press N etc... Once you enter all your values, press FV and then press CPT to find the FV of the loan or whatever it is you are trying to calculate.
-- The only other thing I can think to say is if you are getting incorrect values, it is probably because the calculator automatically accounts for the TVM. (time value of money) So after every separate calculation make sure to CLR TVM. to do so press (2nd, FV.) which will reset the TVM.
Hopefully this will help you learn how to use it. Its a tremendous tool for anybody who knows how to use it.