i've had my Inspire since launch and i'm glad to say this is a very reliable phone. it does as advertised, it works very well in the smart and the phone department
i consider myself an average consumer that doesn't drool (much) over the next bleeding edge technology breakthrough, so my Inspire seems to handle my everyday tasks just fine (web browsing, social media, navigtion, phone stuff)
also HTC Sense will make it much easier for her to understand the basics of android and the simple user interface is very pleasing to the eye.
my only issues with this phone is the speakerphone could have been a bit louder, and battery life left me looking for an outlet in the middle of the work day.
hope that helps a bit.