Very good product for its price. The batteries I put in it have lasted for months. Actually, I haven't changed them yet. There is, of course, a difficulty in achieving the right foam density and I think you shouldn't expect professional results. I ended up buying ready-made liquid which proved to be better than my own attempts to produce it, but still it's not the foam you encounter, for example, in catering stores. I bought it for 11 euros in April 23. Now I see that its price has gone up a lot.