As UWSurfer said, they do charge $50 a week for wired. We brought our router and used it to access wirelessly. There were four of us.
Sands of Kahana is a very nice resort and not like a Marriott or Westin at all. That's one of the reasons we like it. It's more like you are staying in Hawaii. If you are inside a unit at the Westin, the inside of the units are so much like other resorts, it's not like being on Maui. I realize it's very luxurious at the Westin, and when on the lanai, it's got a very Hawaiian feel, but the inside of the units, not so much.
We like the open windows and let the breeze in at Hono Koa and Sands. The sun does set in the West, so that part of the day gets warm in most of the units, even with the windows open. But the sunsets are fabulous to watch, and depending on the time of year, the days are short enough that the sun sets fairly early. We tend to leave in the afternoon anyway, so we come back for sunset.
I wouldn't hesitate to take a 2 or 3 bedroom at Sands, but we own there, so we are a bit biased.