My house is pretty much the worst case scenario for HDBaseT. Everything ran to the master closet on the 2nd floor in a 3600sqft house but I wanted it all in the garage so I pulled everything up to the attic then ran an additional 50ft of cable to the garage for every port in the house.
So the circuit path goes HDBaseT->Wall Jack->cat5e to attic->patch panel->cat6 to garage->patch panel->HDBaseT. So no chance in the world HDBaseT is going to work right, I would be lucky if I could get a good 10BaseT signal going.
I bought two HDBaseT products anyways, the KanexPro
and the Atlona
As HDMI extenders both work great and have performed flawlessly over the past 3 months I have owned them.
The Atlona however does not pass through ethernet reliably. It can barely make a dhcp connection, let alone stream anything. No difference if it's 300 feet or even just 2 feet of cat6 patch cable, ethernet doesn't work. The picture and sound however are flawless, as is is the bidirectional IR.
The KanexPro does a decent job of passing through ethernet and the picture is the same as the Atlona but the lack of bidirectional IR is annoying. The Atlona currently goes to a 55" LCD in the bedroom and the KanexPro goes to 1920x1200 monitor for a computer, with a TiVo, HTPC, and Office PC plugged into a cheapo 4x4 monoprice switch.
I need a third and soon a 4th extender so I am going to try the Monoprice ethernet version next. The Atlona and KanexPro both went up in price by almost a $100 since I bought them...