Overall pant shape is a bit weird for me personally. They fit kinda like tubes on the lower half.
Pockets are standard. The flaps are a nice addition that makes stuff feel more secure but sometimes is cumbersome to grab due to material being a bit stiff when new.
Vents are great in these pants especially in NYC when temperatures change going in and out the subway. Only issue I have with them is that the back vent flairs a bit due to the tension (?)zip function which makes the shape of the pants not very flattering.
Belt system is a pretty mediocre and I find myself using a normal belt instead with the pants while having the integrated one as decoration.
Have heard many people say they want to a pickup a pair of P46 as an alternative to the P33-DS however in my opinion the pants are completely different. P33 feels like a streamlined tech trouser while P46 feels like dryskin pajamas.
Hope this helped!