How do you know PLT works better than wireless? Do you honestly believe that so many companies would offer wireless networking products if they didn't work? Since you didn't know the technology existed until a week ago, it seems pretty obvious you've never used it. Speaking of which, how many SEVU products do you have? Have you even bothered to try one of the products from the company you so blindly endorse?
I've never tried a SecureView in an office building, but I have used it in my house. The B/W image is acceptable for seeing what's going on in good light, but it's certainly nothing you'd want to watch very long. BTW, SecureView is VERY susceptible to interference. I also have a wireless network in my house. The signal strength varies, depending on how far I am from the router, but I have NEVER lost the signal or experienced interference of any kind. Oh yes, and it’s transferring 11 Mbps.
I have also used wireless networking in an office building. Concrete floors, metal studs, microwaves, tons of computers and electronics. Not only does it work seamlessly within one building, but you can even move outside and go to different buildings (and it’s faster than 11 Mbps). Are you REALLY comparing SecureView to that?