I wanted to replace the aging battery in my Galaxy S6, and thanks to the glass backing I needed some special tools. My regular heat gun was just not doing the trick, so I bought an iOpener kit!
The repair went really well! I've opened several iPhones to fix screens for friends before, but the tools they provide with the screens are no match for this kit.
Be careful with heat guns! I've seen several people damage internals with too much heat and shatter screens with too little heat.