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.)

for you wide board fanatics....if you are looking for a board that charges the whole mountain and won't let you down when you are at the top of a hike on the most gnarly mountain top where most won't even dare, then look no further....this board can do the most insane riding done......with a tapered shape to float endlessly through the deepest pow, and a progressive sidecut to hold an edge through the choppiest of snow, this board is a great board to hold up to your riding with a two year warranty.....so what more do you want.....

Pantera is a good freeride board with MW profile like this you can take a little bit less size and you keep your float in powder. It's a pin tail board with a set pack perfect to do a nice slash and if you like to carve in a slope it's fucking good