Definitely do. I mostly follow Alton Brown’s recipe, but I use a jar of the Mt. Olive roasted red peppers instead of roasting my own as a time saver. I’ll also usually do a 28 ounce can of crushed San Marzano tomatoes in puree instead of the beefsteak tomatoes. Both of these are because I usually make this as a weekend breakfast, and I can’t be bothered to make those fresh first thing in the morning.
Also, Alton’s recipe uses urfa biber pepper, but Aleppo pepper is more traditional. IIRC, Aleppo pepper was hard to come by when he published it during the Syrian civil war, but it’s much more plentiful now.
The quick preserved lemons and the harissa can be made well in advance, and are also delicious in many other dishes. If you don’t want to be bothered with the latter, Trader Joe’s sells prepared harissa in a jar.
Looked them up. Apparently they used to be owned by Smuckers, who kept the production in Canada, but they got sold to a company called Treehouse Foods, who moved it to Wisconsin. Treehouse apparently mostly makes store brand products.