Be wary of schools in Spain which have relatively young instructors, make sure YOU are granted the right to choose / change your instructor, if necessary. Now, before anyone makes accusations, I'm not being agist, but I know someone whose instructor would regularly get bladdered on a Thursday, Friday and Saturday night so there was no flying on Friday, Saturday and Sunday.... instead they had to do 'ground school'.
Unfortunately the owner of this school refused to allow my friend to change the instructor, basically because no-one wanted to fly with him due to his partying. You can imagine how wasteful that was....