From the cricket perspective it was an unparalleled box cutter / opener.
Originally I used to carry a CRKT peck for this purpose (at a bar), and while it did seem to slice very keenly, making short work of boxes and tape alike. I frequently found when in a rush opening plastic wrapped packs of soft-drink bottles, Id all to often slash the bottles open with an idle stroke (like wise with crisp packets).
The re-curve S of the Cricket on the other hand offered quite a unique profile (and while I did slash a few bottles when I started using it

), which really lent itself well to delivering very shallow controlled cuts;
By choking right up on the blade (with the handle pretty much loose in my palm) and my index finger running right along the spine of the blade (thumb and middle finger controlling the blade) I found you had only the little tiny beak of the S protruding from the pad of your finger (kind of like a claw). This meant to open say a box such as a crisp box (chips in the US

) sealed with a long central strip of tape, you could place the pad of your finger directly where you wanted the cut to originate, and draw it along the cut with the very tip of the beak only penetrating by a few mm.
Sounds really picky and a bit uncoordinated on my part I know, but this accuracy and option for extremely shallow penetration was highly valuable to me;
For example when opening items such as a cellophane wrapped suit etc. Normally Id nick a few places on the wrapping and tear the rest, but with such control Id happily zip the whole package open
Another one I found was for cutting string / cord, where the hooked S was excellent for that last little tug to separate the string etc.
Sorry that I cant comment on the Dodo, but I do think the S shaped blade is an excellent utility blade. Maybe not so good for food preparation etc, but with a multitude of other uses theyre very handy.
The only thing I would comment on the Dodo, is while the blue handle is rather sheeple friendly, Ive always found with any blade that isnt a bog standard pen style blade, tends to be met with raised eyebrows and sideways glances.
While I was comfortable carrying the Cricket in the UK (due to its diminutive size), I think the exotic lines and nature of the blade would tend to be looked on as some sort of martial arts blade by the police (along the lines of a Kerambit), and as such I would personally shy away from it in favour of even something larger such as a PE Eudora (due to its standard socially acceptable nature).