Skoda Fabia - Skoda fabia 1.2 coil pack problems - pjolloper

I have a 2005 Skoda Fabia 1.2. 21000miles. Within the last month all three coil packs have failed (separately) and been replaced. Can I rely on them now, or do these go regularily. (trying to find out if they were just a faulty batch or this is a continuing problem)
thanks