I am having a discussion with my son, an engineering freshman. He's just finished the first year, and he's very happy and thankful of having the HP Prime calculator. Probably it is the best calculator for a student nowadays. I have the feeling that the HP50g is the better calculator, due to its more "elegant" programming model; however, the Prime has more raw power and is easier to program is a procedural language similar to basic. (It is surprising what can be done with this language. You can take a look at the games that have been programmed with it in hpcalc.org. I hope that my children never see it or there goeas another distraction more)
My discussion with him versed on the fact that the HP15c is the best calculator to master "for the rest of his life". I see no point in having him using a HP41, even the cel: is a cumbersome machine that will occupy a lot of room in wherever he puts his things; The hp42s would be an alternative, but even that one is a little too big; but the HP15c is exactly the right size and has everything the prospective engineer needs - short of anything a computer spreadsheet or Mathematica or Mathlab can do. Plus, it is small enough to be really portable and carry it on your jacket pocket; and it keeps the utter elegance of the HP50g we were discussing about.
I plan to have him learn how it really works. He'll have one as heritage, and he'll be thanking me for it in the long run. I guess that the Prime will not see much use after he has finished college!
I will give it to him with the leather case to increase the acceptance rate - by the way!