In-Motion Satellite Question

[ragster_ga]

We are thinking of installing in-motion Satellite on a "soon-to-be
ours" 1986 PT-40. I know there have been a lot of discussions on the
pros and cons from my initial readings. I would be interested on any
suggestions anyone might have on the following:
1) Are you happy with in-motion?
2) What Brand would you recommend?
3) Do you have HDTV and does it work well over in-motion?
4) How difficult is Satellite mounting on the aluminum decking?
5) Is there an optimum location to mount on the PT40?

Thanks in advance for any comments.

Glenn