When it comes to eye primer, I rarely see any significant difference between one or the next. With the exception of Benefit's Stay Don't Stray, eye primers don't really excite me. For the most part, this is still the case with Photo Finish.
I do like it, as much as I'm capable of liking a lid primer. When using eye primers, I'm not looking for increased longevity as my lids are so dry there are no oils to crease or breakdown my shadows. Rather, I'm looking for something that will grab hold of shadows and enhance their vibrancy. Photo Finish accomplishes this to a degree.When you finish applying it, it doesn't completely dry down, instead leaving the slightest tackiness to better hold shadows. I also like that it gives me some coverage on my lids. Any redness or veins are covered up with this easily, yet it's not opaque enough to look ashy on my tan skin.
Would I be interested in purchasing a full size, based on the sample? Maybe (but probably not)
I really don't see myself being interested in many eye primers enough to put down a good chunk of change for them, but if I were into them, I think Smashbox would tempt me a bit more. For now though, if I absolutely must have a primer, I'll just stick to the e.l.f. one for $1.
You can find more information about this primer at Smashbox's website. It retails at Sephora for $20.