I just upgraded from my HN9000 this week to the Gen5 system and I couldn't be happier with how the whole process worked out. The installation crew did a "by the book" install and the speeds and functionality of the Gen5 are all that was advertised.
Not to brag, but the system is faster than my local brother's cable provider's internet service...I think he's in shock!
Anyway....great job HughesNet, you've come a long way since the HN9000 was introduced!
Just remember this when it comes to a metered connection... IF Microsoft pushes a very critical update (im talking MAJOR zeroday like event or similar stuff) then the system will ignore the metered setting. Those updates tend to be small emergency patches. I can think of only two times that has happened, and when it has, those updates even went out for WinXP users.
One thing the Metered setting does help with is that it limits how often your machine calls home with telemetry data, it still will but not nearly as often, among how frequently Windows Store based applications (think Candy Crush, and other applications from the store it self) will update, as they are updated seperately from Windows Update.
Metered changes a lot of things in a system, most of it isn't immediately obvious.
Trust me, I know how you feel about massive updates from Microsoft... Thank god I only do this once in a blue moon.