I'd also recommend picking up the Breville cutting board:

• https://www.amazon.com/gp/product/B002XTBZK0

It fits perfectly on top of the APO (has heat-proof feet to raise it up) & gives you a place to put hot pans! As far as the mats go, they do a pretty decent job. So my stack is:

1. Mat on slide-in rack
2. A few spaces down, pan on second slide-in rack to catch the drippings

This allows airflow under the perforated mat. Chicken, burgers, and wings have all come out good so far! The airflow underneath isn't perfect, but it's like 90% as good as the top. I flipped over a couple wings to show the under-side with the mat:

• https://www.reddit.com/r/CombiSteamOvenCooking/comments/lo9sno/think_ive_got_the_workflow_down/

I'd say expect to budget about $150 for aftermarket accessories if you want to get serious use out of the APO (or even more, if you want a Baking Steel). That way you can get racks, pans, mats, a cutting board for the top, some jars, and some silicone trays for things like egg bites in order to make a variety of things with your tool & toolset! I've had a lot of fun with mine over the last few months:

• https://www.reddit.com/user/kaidomac/posts/

I have a microwave stand for my APO:

• https://www.reddit.com/r/CombiSteamOvenCooking/comments/ja6qs4/new_stand_fits_perfect/

Fits perfect! $127 shipped on Amazon:

• https://www.amazon.com/gp/product/B07GTCQLR9/

The BSOA cutting board also fits perfectly on top:

• https://www.reddit.com/r/CombiSteamOvenCooking/comments/jag5f0/bsoa_cutting_board_fits_just_right/

It's short enough not to cover the rear vents & has heat-proof riser feet underneath. $40 on Amazon:

• https://www.amazon.com/gp/product/B002XTBZK0/

It's really handy because the microwave cart doesn't have wings on either side, so there's no place to put larger, hot dishes to load & unload into the APO.