We've used this coffee maker on several car-camping trips and at home on the stove. It creates a good, quality cup of coffee. We have had trouble getting the coffee to come out without sputtering and spraying coffee all over. It also seems to go through a phase of "making coffee" and "sputtering" coffee several times before completing its job. We've tested this on our stove at home, so it does not seem to be a function of uneven heating.
Ultimately, we'd love to take this on backpacking trips, but with the difficulty controlling the output of the coffee, its not quite "leave no trace" -- nor advisable in areas with bears or other potentially dangerous animals. For that, I suppose, we are again relegated to the realm of instant coffee.
But, for getting my caffeine fix for low-key car style camping events, its perfect!