Well after getting mine on Monday I finally put it on last night. Good thing I had waited since Apple replaced my phone on Wednesday because of a defective battery (Only 48-60 hrs standby time with less than 1 hr calls, and 1-2 hrs usage per full charge - as of when I turned it off last night for the BSE install it was still FULL after 24 hours standby

).
Anyway, I would hate to put on an IS after reading the BSE is an easier application. Not that hard, but tedious, definitely takes patience. I installed the back first and had to wait quite a while to tack down all the flaps. No airbubbles and virtually no water left to evaporate. Also put on the home button and top and bottom strips. Decided to stay with my Crystal Film for the screen. It's only been drying for 8-10 hours now, so I will wait till later in the day to turn it on. Probably another 4 just to get in half the recommended 24. They say it takes 24-48 to set completely, however I can't imagine it looking much better. Really I had no bubbles or pockets of water except a little bit on the sides coming up to the bezel and on the back where the black and silver meet. As far as the flaps and corners, I was able to get all the flaps down flat, no overlap or creasing.
And the tackiness is awesome. Held it in my hand vertically and shook by hand up and down and it didn't budge. Not even a tight grip. Not to mention my foofpod case, being corduroy, was a little bit loose, quite easy to slide in and out. Now its a bit grippier. I can get it in the case real easy and out too, but it doesn't just slide right out, I have to give it a tiny shake, which is nice. I will post pics of the BSE and my case.
Fantastic product, definitely have to give it my recommendation. "For those unheathlity obsessed with keeping their devices shiny" is what reads on the envelope that it comes in, and if you're not that sort of person, you probably don't have the patience to get this on your iPhone right.