An open face antenna does not allow you to find those satellite that were blocked by trees when using your Tailgater. The Eastern Arc satellites (only 61.5 and 72 are required these days) are substantially closer together but they are a bit off the East Coast (in line with Eastern Maine) so how far West you travel will make getting these difficult but you can then use the WA. Having the option for both is great if you spend a lot of time on the Eastern Seaboard. You can do the same thing with an open faced antenna and simply swap out the EA and WA LNB's. It's just a matter of how much work you want to do.