So I got the foam gun Kärcher this morning and was immediately put to the test.
Once found the right dosage (1 to 7 in my case, but it will vary depending on your product) gun is effective.
Although the foam (with identical content) is not as dense with a pro starts, but we are talking about a product worth one tenth of the price for a result just right.
You can adjust the percentage of foam (without interest) and set the blade (horizontal or vertical). The gun fits perfectly on my Kärcher and not moving. 0.6 The tank is ample for a large car.
Looking for an economical product and you're ready to fumble around a bit to find the ideal dosage, then this product is for you.
Want a dense foam, which takes a long time, and budget is not an obstacle for you, then I suggest a pro Lance Foam.