A system that manages all your vacations is a thing which can be improved in many ways. On functional level there is a lot done, but when in comes to User Experience the landscape is not so bright.
This example reminds me of the times when we installed Windows 95 copies on 333MhZ PC’s equipped with CD-ROM device which was so loud that the neighbours weren’t that happy about. And this product is worldwide used by millions of users. Not to mention that the company created it and supporting it is the biggest European company by market share.