Client assessment

We asked our clients what they think about our service. This is a special comment:

Ok, it is a pleasure to complete it, but my answer is: MORE TAN EXCELLENT, ALMOST PERFECT. 
Except when the volume decreases…

Ok con gusto lo completo , pero mi respuesta es: MAS  QUE EXCELENTE , CASI PERFECTO 
Excepto cuando nos caemos con el volumen…