This is the first foam cannon I am using, for washing the car I think it does a very good job and you really save a lot of time. For cleaning air conditioning, I don't know if it will be useful because a lot of liquid comes out during spraying, generally it dispenses the contents quite quickly. Keep in mind that it sprays foam only like a fan and not targeted. Anyway, what it says it does, it does well. As for its durability over time, I will get back to that. I will also add something else, to achieve rich foam the soap used and the soap-to-water ratio play an important role. Also, since another user has mentioned that the pump cracked after a few uses, in my opinion, do not over-pump the pump excessively.

Unfortunately, it did not work for the job I wanted it for (Air Condition cleaning). Firstly, it couldn't handle the pressure! The black plastic hose of the sprayer deformed and developed large cracks along its length. It broke after the first use.
Also, the spraying method was not suitable at all for this job because there was no adjustment to run it like a faucet or at least with more targeted spraying.
If I had seen the nozzle it has, I wouldn't have chosen it.
For plant spraying and watering, where the requirements are different, I think it's fine. One positive aspect is the transparent container that allows you to see exactly how much liquid is inside.