Stretch Magic Clear Bead Cord.7mm 25 meters (about 82ft)

Is this crystal clear/transparent, or older milky clear?

Is this crystal clear, transparent, or milky in color (older product)?

About how long will this product last before it breaks? The stuff I got at the store seems to break about every 3 months. Tired or re-stringing it.

Using this cord can I hide a knot in Size 6 seed beads. If so, how?