I've just done one for an iPad mini. Bit fiddly (lots of miniscule screws) and p1ssed off at getting finger prints on the actual screen - they are a bugger to get off again - but got the whole thing back together again.......
witha frikken HAIR trapped behind it


The very last thing before fitting the new glass is removal of a protective plastic sheet - and the static electricity that was generated pulling it off must have drawn a loose hair towards it. Didn't notice until it was all sealed down again

and, yes, as you'd expect I BROKE the flippen glass trying to get it back open again



sigh.....
fortunately the glass is cheap these days but damn.... you need 'clean room' conditions to do it properly.