I am using the coloplast 1 piece Mio which I really love. I get great wear times and the filters are really working for me.
I remember that early on after my ostomy I tended to have much more gas.
As time went on it got better.
Of course gas issues can be kept minimal by diet....avoiding foods that will produce a lot of gas . Also chewing gum and taking in a lot of air can cause gas.
I often chew gas X when I feel the need to.