Share 'classical guitar comparisons'

My 14 year old son has been taking classical guitar lessons for the past year.  We have been borrowing a friend's Ruben Flores guitar since he bought a larger one.  My son is now out growing this guitar and his teacher sells Rubin Flores guitars at her store.  She is an accomplished classical guitarist and I respect her choice of guitars but I just want to make sure this is the way to go.  We are…