I wanted this board for a few years and finally found one for a good price. I'm 6'1", 205 lbs with size 13 feet, and thought the 166 Wide was going to be amazing for freeriding on advanced terrain. I took it to Tahoe and Snowbird in 2009. Unfortunately I really didn't like it for the following reasons:
1. Waist width of 27.3 cm - so wide as to be unwieldy. I have big feet but I think you'd need size 15 or bigger, or ride at fully 0 degrees stance, to utilize it. With a regular slightly ducked (19f / -12r) stance, it felt way too big under my feet and I had to practically throw it from edge to edge.
2. The sidecut felt grabby and unstable. Maybe I just wasn't used to a tapered progressive shape, but it felt wiggly and catchy and i wasn't comfortable on it.
3. For such a big board, I couldn't believe that I couldn't get a wider stance than 23". And this is after tweaking everything possible to get the bindings wider apart - i think the inserts only go to 22", which is insanely narrow for a board of this size. That contributed to my uneasiness riding the board, and also made my legs get tired faster than with a wider stance.
Overall I think this board could work for guys over 6'2" and 220lbs, with feet size 15 and up. Speaking only from my experience, this is too big and too stiff for anyone smaller.
(This review is of the 07/08 pantera 166 wide, the one with the stylized panther graphic on the base.)