This is a review of Curio ... all versions. I just downloaded the 4.2.4 release, and I will be using it.

Claiming that an application is worthless because you loose some data is pointless ... unless it happens ALL THE TIME. Not saying it didn't hurt ... it always does unless you back up your data regularly.
I run Apple Backup every day on my curio files every day. I have never had to use any of those backups.

I have used Curio for quite awhile, and I find it very useful for what I do. It does have a lot of features that I do not use, yet. I wish I had more time to play with it and get really comfortable with all the things it does ... but I work, and for that work, Curio is very helpful.

BTW, I'm a graphic designer (30 yrs worth), and I have been using Macs since the Mac Classic. I do know a good useful application when I find it.

I give it 5 stars ... because I KNOW it works.