I've done a similar repair 4 years ago and still holds. What I've done different,at the end of the crack I've punched a bullseye to prevent further expansion of the crack. Using UV light helped not to have any bubbles.
My brother in law was a windshield repair and replace guy. He used a diamond drill bit, made for drilling glass, to drill a hole at the end of each crack. That way it won't spread, since it rounds off the end. Then he fills the hole with resin to make it disappear. You only drill through the outside glass layer, not all the way through.
