Waveydavey,
I did my IR at Aerodynamics last April/May and found them to be a really professional outfit.
Due to my weekday job in the UK I had to commute down there for weekends mostly to do the training. I also did 1 full week at the beginning of the course, and a further 2 full weeks at the end (to do the flying). I was able to use my leave entitlement to accomodate that. Aerodynamics could not have been more helpful in working the course around my availability.
Regarding the comments about 'don't do it in Spain'... I can't comment on others experiences, but I have just completed my IR Instructors course at a UK FTO with no problems at all... so Aerodynamics must have got something right.
Hope that helps.