Did it yesterday and everything seems to work fine, but it happened to be really hard for me.

Separating the front panel was the most difficult part, the clips held it so tightly that the glass itself started separating from the plastic frame on the left side, I freaked out a bit, and was very frustrating. In the end, I managed to separate the right side by slightly moving the suction cup to that side and then I could pry the front panel open with the plastic opening tool. This was hard too, the left side was real tight.

After that, the only problem I had was separating the battery, that glue is a pain in the @%^ and it's not easy to pull without damaging the components. I had to use a metallic tool as a lever because the plastic tool kept bending, and I still don't know how I didn't damage something.

This tutorial was good, but I'm never gonna try this again on my iPhone.