Good group of guys, and they have an actual schedule, unlike many 135 operators. When someone I know was there in 2008-2010, they did there best to get the planes home between trips, so you probably won't spend the entire 17 day stretch on the road. I know they do try to keep at least 1 plane out all the time now.
As for the upgrade thing, if you get hired as an FO, plan to do it for 2 years before upgrading, they've been known to hire a street captain if the need arises, and ARG/US or Wyvern minimums for flight crews apply. The DO and other management are pilots too and semi-regularly fly trips.
Lastly, if you go to work there, they will do your best to get you home for Christmas, as SC = The Swiss Colony, and Christmas sales are most of their business.
Feel free to PM with more specific questions.
BeeFCaKe