In no particular order, here are a list of products that I would buy all over again if I had to start from scratch.
Some reviews state the electronic flush mechanism doesn't last forever, but it has held up just fine for our use so far. It feels like a regular toilet to use, and the waste tank seems to keep odors contained surprisingly well. It's also not to awful to empty, and lasts two people almost a week of regular use between dumps.
We installed a microwave as well, but we need to plug into power or run a generator to use it, so we have found the camping oven to be far more useable for our camping style. It is a bit slower to heat our food, but the propane seems to last quite awhile, so it has yet to be an issue.
The stove has worked well for us also. I do wish the grate was a little finer, and perhaps one burner was smaller, but in the end, it seems to be the best option available. We use is with a stovetop percolator to make fresh coffee every morning. Again, no issues whatsoever up to 10,000 feet.
In the end I found a great combo detector on Amazon, which I've ended up loving! Not only does it function like any other detector (screeching alarm when in danger), it also has an LCD screen that displays any detectable carbon monoxide. I loved the idea of this screen, because it meant we could notice and adjust to CO levels, long before they become dangerous and an alarm sounds causing panic.
The detector served it's purpose on one of our first trips when my diesel furnace exhaust was inadvertently getting inside the van. With no odor or reason to believe anything was wrong, the blinking numbers increasing caught my eye, and I was able to adjust our roof vent from blowing air out (causing a vacuum that was pulling in the exhaust), to pulling fresh air in, which cleared out the exhaust in no time and eliminated the problem. It was an easy and quick fix with no harm done, but had we not had this particular CO detector, we would have had no idea of an issue until it started screaming at us.
As smoke tends to raise and carbon monoxide tends to sink, I purchase and installed two of these detectors; one low and towards the rear, and one high and towards the front. Two is overkill, but I absolutely do not want to die in my sleep in my camper van.