A really useful and affordable tool to show customers proof of their cable performance. This is, they say, the only one of its kind. The closest competitor is an Ideal Machine, which costs $1,500 and doesn't really do much better. And REAL gigabit scanners (testers) go to 5 or 6G! The problem with throwing that kind of money at a tester is that the standards keep changing! 10 years ago I spent 6 grams on a top-of-the-line pentascanner. It became obsolete 4 years ago when cabling standards changed from Cat5 to Cat5e. Manufacturers are already releasing Cat7 (yes, copper) cables up to 10Gb! Putting that kind of money into a horse that's about to go missing is risky. For $300-$400 you can't go wrong and it passes most tests up to category 6! On the other hand, the menu is very clumsy. for us cable installers who just want to hop from connector to connector, checking each link and documenting the results, which is what MOST buyers use it for. It actually requires a firmware update to bring the MAIN MENU directly to testing instead of the 3-4 clicks you have to do on each test. And a little extra circuitry to protect from POE voltage on BOTH ports will save me constant worry when I'm going to fry this thing on the next socket I plug into. However, I'm happy to spend a few hundred on it and make my customers happy. At least until Cat7 becomes mainstream.