It doesn't feel the same quality in my hand, but I could overlook that if I didn't have problems right from the beginning.  It works for a while and then shows Pr Error; I reset it, but that only works for a few minutes.  I have been using the same HP 12C since I went to work for FDIC in 1986, almost 30 years.  I never once had any problem with it.  It has been a dependable workhorse, but finally gave up the ghost.  So, I'm incredibly disappointed.  I did, even though it came with batteries, order some new ones for a backup.  I just put those in and in the 10 minutes I've been using it it has been okay.  I am NOT going to be continually draining it with a dime in the battery case.  If I have to do that, I'm returning it.  I want to use it.  I don't want to think about it.