We have not done any testing on these units as we are just vendors for the product. You should be able to find reviews for the LINK-S on Youtube, in firearms/hunting forums online and through Facebook, and direct from Spypoint, the manufacturer.
I purchased my Spypoint Camera Links s-v. I loved it at first but ran into some issues several times.
I had it for a year and the devise would not boot it was under warranty they replaced it. It was in the cold of Wyoming. Then the replacement wen out of warranty and the same deal will not boot. Did the support rout very nice folks but it was 4 months out of warranty for the second failure.. They wanted to give me a 20% discount on a new purchase. They said they could not do more. Not sure if the cold Killed it or just product failure. I did notice that they are often are sending updates to the firmware. When I called Customer service they would always blame the firm ware for the product failure. I like the concept but this is not ready for primetime. For a product of 500 dollars US it should last a lot longer than 2 years. I would not be writing this if it lasted 6 years.