In all honesty, Pages is one of my favorite apps I've ever used. It's simple, looks good, produces stunning results (just look at my DT folder-mostly made in Pages with a template and everything-lovley!). It's really flexible-can open & export multiple file types, etc. Its one of those apps you just love to work with. I do have 2 issues though-its rather slow when there are loads of objects in a document and the file type it creates-they are incredibly prone to corruption!
I've never had a Pages file become corrupted, and I've created probably hundreds. What's happening?
FWIW, Pages doesn't create files, per se -- it creates packages. They can be opened and the contents viewed by control-clicking.