I agree that making your own cables, when you aren't experienced, isn't really fast. You need good wire cutters/strippers for low-voltage, and good crimpers and terminations. But, it's really not hard. It's not super easy, but not hard. Just takes time to do.
The number one issue with HDBT is the cable. If you leave it all up to someone else, then when (not if) something fails, you can't fix it yourself.
I've gotta say that I have a couple of clients who have recently gotten HDBT installations from me using cat-5e cabling, and they are all working properly. The cat-5e was already in place, so I had no choice on the matter, but it does work in typical residential installations. That said, I would prefer to use a decent cat-6 cable.
In my own home I'm about to go through the upgrade from cat-5e to cat6-STP cable. But, that will be a process, and I'm having a coworker terminate everything for me. At some point I'll get a crimper and learn to do it myself. I just want someone experienced as STP cable is a different beast than standard cat-6.
Anyway, the product looks good. I would stick with the industry recommendation of using 568-B terminations on all cat cables. Keep in mind that all sources have to be close to the switcher as the switcher only has HDMI inputs to it, none of the inputs are HDBT.
If you decide that you want some components, like a Blu-ray Disc player, located away from the switcher, then you can use a long HDMI cable, or you may use a HDMI extender to take it to the input of the switcher.
As a rule, I tend to pull 3 cat cables to every location. This gives me a cable for video, a cable for control, and a cable for network. Often, this leaves the 'control' cable as a spare.
There are some HDBT units which include Ethernet on the connection as well, but this unit does not inject Ethernet into the HDBT transmitter, so you will need that separately.
Generally speaking, this isn't an inexpensive option, but it does work, and can create a very unique setup. We are up to about 10 sources now which we can view on any TV in the home and control them through our remote system nicely.