Review (4/5): Good product, but not for those with large arms.
I purchased these as sort of a middle-finger gesture towards my workplace's request that I cover up my upper-arm tattoo. The tattoo in question is only partially visible, and what can be seen is a single green tetris block the total size of about 1/3 of a credit card.
So, I figured that a full-arm tattoo-print sleeve would be a perfectly reasonable covering for said tattoo. Certainly, they never specified that the sleeve had to be patternless. I went with the koi design, as we sell fish at my work and it seemed the most innocuous. And, while I was told they were "not work appropriate attire" and ended up cutting a sleeve off a compression shirt, I would still rather be using these. Had I more narrow arms, I would strongly consider wearing them outside of work because of the inherent quality of the product and the print.
First, I have relatively large biceps and forearms - this stretched out the print to the point where it ruined the illusion entirely. That said, as long as you have reasonably average-sized upper arms and forearms, there should not be an issue.
These are probably most comparable to stockings - there are two seams that slightly interrupt the pattern, and they can be prone to developing "runs".
However, the product is perfectly good and functions as described. My forearms, being more narrow, allowed me to appreciate the intended effect of the product and I was not disappointed with that aspect.
All of the prints were crisp and clear and looked quite good. There was no unpleasant odor, and there was no ink rub-off on my arm. Additionally, I work retail, and they stood up fairly well to light abrasion and small tugs and impacts.
Also a cute girl told me I would look good with a real full sleeve tattoo. It's a good way to give the concept a field test, I suppose!