I tend to buy more soaps than I technically need - just like I have more razors and brushes than I can get away with - because variation is the spice of life, and I consider shaving to be a hobby and not a chore.
The downside is that it sometimes takes a long time for me to use a soap enough times to make up my mind on what I think about it, so this little review has been long in coming...
The Derby shave stick is, like most shave sticks, easy to use. It makes lots of lather and smells okay - mostly of soap - but it isn't quite up with the Arko as far as glide and cushion goes, it's more like the GzD in that respect. It's hard like the Arko, not soft like the GzD, and comes wrapped in paper.
If you can't handle the scent of the Arko, the Derby is a good substitute for an inexpensive, efficient shave stick. If you can handle it though, go for the Arko stick.