It's really not as hard as you may think.
But it IS time consuming.
It's something you can't rush.
And if you make one small mistake, you will get frustrated as hell.
Especially if you cut it too short, or if the tint starts to crinkle, or if a part of the sticky side touches another part.
Trust me, you can easily become frustrated.
Oh, and the back glass will be a b!tch to do.
Just pay someone at a shop $100 and get it done.
That way if they screw up, it's on them