I used Hollister two-piece devices (I've had a takedown just a month ago). Hollister's customer support is really fine. And I liked their products much more than the Convatec I tried in the beginning.
What my insurance provided for was the barriers, pouches, lubricant/deodorant, powder if needed for chafed areas (hardly ever used), and spray adhesive. The ostomy nurse who came to teach me how to use all that stuff advised spraying the adhesive on my skin and then applying the barrier. Pah! Bad advice. Hollister advised spraying the adhesive on the inner seal area of the barrier, and then applying it to the skin/stoma area, and peeling off the paper for the secondary material beyond the inner seal. When I started doing that, the leaks under the inner seal stopped.
They recommended changing the barrier every 4 days, and changing the bag every 2 days. I did that religiously, and had no problems with blocked filters. The only time I noticed any odors was when I ate onions -- they worked really fast! Otherwise, I was stink-free. Every time I emptied the bag, I'd add some deodorant-lubricant, and that helped a lot, especially in keeping things moving downward from the stoma toward the bottom of the bag.
Hope this info is of some use.