I just upgraded from 1.7 to 1.7.4. The reason why I hadn't done it before is that I was scared that something would go wrong and I would have to use many hours (that I don't have) on trying to figure out what the problem is.
The upgrade went very smooth. The instructions are very straight-forward, simple and easy to follow.
So if YOU are wondering whether you should upgrade but you're afraid that it takes many hours, just go for it! It took me 5 minutes. And I didn't even have to do any mods to the extra template that I have!
Thank you 4homepages!
Best regards
GEA