Cambelt Change

[S6OOH]

Forgive me but I was watching Car SOS whilst under the influence the other evening. They were doing a cambelt change and he simply cut the old belt down the middle, leaving half the belt in place, slid the new belt on and then cut the old belt off and slid the new one fully on (and presumably tightened up the tensioner.

This makes sense but seems too simple, esp given the proposed charges for changing belts on some cars

Am I missing something or is this a winner?

Cheers
Richard