I demoed it twice last year, once in 8" powder, once on old snow groomers and bumps. This ski is easy for such a powerful ski. It is a good groomer ski - if you like to go fairly fast, anyway. It will aggressive GS carve. Very stable on edge or slarved. Holds an edge easily, but can be thrown into a smooth sideways smear on a dime, very safely, at speed. On groomers. You can ski it well fast or slow, but it's a standout fast. Very forgiving.
One con: it's not as nimble as the Pettitor 122. So not a hardpacked snow bump ski, to me. I like the Pettitor in trees, but would be reluctant to take the 118 Pinnacle into tight trees, myself. Seth much be able to do it, however.
I have a friend who used it as his daily driver all last year, and loved it. Probably will use it again this year. He previously had used the 116 width Obsethed as his dd, for reference. He says the Annex/Pinnacle 118 is a versatile, easy to handle charger. He's 5'9", 185 lbs, no fat. In his 50s but skis fast, skilled. A lifer in the ski biz.
In deep powder he says it has a slight tendancy to tip drop/dive, unless compensated for (not leaning forward into turns as much, he says). Hope this helps. It's one of my favorite skis, and I may still get a pair myself.
(for reference, I'm 5'10", ~150 lbs, finesse skier.)