Circ Saw Spindle Locks: Are they worth it?

Hello Everyone,

I am a novice woodworker, and am asking this question honestly. I recently purchased a Porter Cable PC13CSL from Lowes at $59.97. It's a 13-amp saw with a laser, and no spindle lock. After I brought it home, I looked at the box and began to wonder if the extra 2 amps and spindle lock were worth the $15 more for the PC15CSLK at $74.97.

From my reading, I know that spindle locks make blade changes easier, so I guess I am asking for your concensus on spindle locks for circular saws. Thanks in advance.

Donnell Wells