Cillian's place has a phenomenal view of Lough Derg. The space is huge; plenty of room for a big group. If you're looking for a secluded spot for your crew to rest and relax, this is an awesome choice.
The only downside is that we were never able to get the hot tub to work. This was a big bummer, since the hot tub was a big part of the reason we chose this particular place.