My wife cracked the glass on my S4, it all works, but the glass is broken. I know I can use a heat gun to remove the glass and buy an OEM one off of the internet (many fakes out there). Adhesion is a different story. Some use the double sided tape method, but the OEM way to do so is through a clear glue that's activated via UV light.
I personally am not willing to try this as I have too much invested in my phone to screw it up royally. Anyone had this replaced with a reputable company? I know local places do it, but none have been reputable. Aside from sending it back to Samsung, have you guys had this done anywhere you'd recommend? What did it cost you?