[CentOS] Changing mount point - 4.3

Hi

A box was installed with the majority of the free space in /home but i actually want this to be available to /opt. My fstab had /home looking like this

LABEL=/home /home ext3 defaults 1 2

I umounted /home and changed the fstab to look like this

/dev/sda5 /opt ext3 defaults 1 2

and then mounted /opt. All works fine. My question is, is this the 'correct' way to do something like this or should i stick to 'LABEL' ? I wonder as i'm not sure where the label tag gets set and when i see the box boot now it still references /home when in reality it is /opt on sda5.

Is this a really bad thing to do?

thanks