For your next medkit post, have you ever heard of zipstitch?
Be glad to hear your practical thoughts...
The problem with that kit, like everything else, including the laceration, is multi-fold:
Do you know which lacerations to close, and which to leave open?
Do you know why?
Are you sure that's a lac, and not the evidence of an open fracture?
How would you know that without an X-ray?
Did you clean and debride the wound first, with surgical thoroughness?
How did you do that without any local anesthesia?
What structures underneath the skin were affected/damaged?
Did you repair them correctly? With what?
Would antibiotics be appropriate?
What about tetanus prophylaxis?
The supplies necessary to close a lac, in every ER I've ever worked in, comprise enough material to fill a military-sized footlocker, and 95% of them are RX only.
It is not, ever, one alcohol wipe, one gauze pad, a zip-tie gadget, and a big band-aid.
Oh, and alcohol on an open cut? Tell Dr. Mengele you said "Hi."
When your patient swings at you, don't forget to duck.
More importantly, you need a Masters-program level Physician Assistant instruction to cover all the medical knowledge and precepted training by board-certified MDs you don't get in that kit. (That's 3-4 years after college, kids.)
Look, I can buy a scalpel online; it doesn't mean I'm therefore a qualified surgeon.
Any more than buying a Formula car means you can drive a race in F1, or buying a jet makes you a Commercial Air Transport Pilot.
Any fool can close a wound. And has.
The mark of a medical professional is knowing the other 50 considerations are for when to do it, when not to, how to go about it in either case, and what else to worry about.
Screw it up, just once, and you could cost your patient normal function, a digit, a limb, or even their life, in a week or two. There are seldom do-overs if you fuck it up. Doubly so if you're doing it on the cheap, at home.
Gangrene and tetanus aren't funny, and learning on the first 20 patients you maim or kill is unethical in the best (for you) cases, and criminal in the worst cases.
If you want to learn what you're intending to do, and then get the toys, go ahead on.
For everyone else, first aid consists of betadine and saline (or at least clean tap water), hemorrhage control, and a dry sterile dressing, possibly non-stick nearest the injury site. Then accessing definitive care from someone with the tools, training, and knowledge to know what to do next.
Will that kit work?
It will close small wounds.
Which is exactly the problem.
Should any idiot buy it?
No way in hell.
Unless the patient is someone you won't miss if/when you cripple or kill them.
You can close wounds with staples, medical sutures, Derma-Bond (or the non-medical Krazy Glue, which is not "the same thing"), or with ordinary thread, fishing line, spider web, barbed wire, and twenty other field expedients. Just like ranchers do with cattle. It might even work, some of the time.
For some values of the word "work".
People, however, are not beef on the hoof, and if they subsequently die, you cannot eat your mistakes for dinner.
As a general rule of thumb, for anything but scratches and extremely minor cuts, laymen (and that includes me, with only 25 years' nursing experience) closing wounds that need surgical closure, without all the training, and all the tools, is a very bad idea, with a poor prognosis. Proper medical treatment under first-world conditions has about a .998 batting average. You will not do that well free-lancing it, I promise you. You may get lucky a few times. In dire circumstances, and less-than-ideal conditions, you can expect to have patients die. For relatively minor wounds in the First World, that ceased to be acceptable any time in the last 70 years or so.
Stick with what you know how to do.
If you're highly motivated, learn how to do better.
But simply buying a gadget or some gear isn't that.