As a Stretch owner (though ZDP-189 and sprint run VTOKU2 blades), I can tell you what I love about this knife:
+ GREAT blade profile for slicing. I originally picked one up for times I stay in rentals that have abysmal knives, and want something better for food prep. The length, amount of belly, flat grind and thin profile are perfect for food prep.
+ VERY secure lock up (though I know that's the same as the Delica).
+ The very look is just unique for Spyderco. I also own a Paramilitary 2, a Para 3, and a Manix 2, all of which are wonderful knives, but I personally just prefer the look of this knife, overall.
Now, that all being said, the price for this knife here on MD is no deal. And, the sprint run version can be had for $3 more, and in my opinion, the VTOKU2 blade is worth it. AMAZINGLY sharp and easy to maintain (though the edge can patina).