Very powerful product for salts and the grime of the toilet bowl! In five minutes it has cleaned everything. Caution! Do not leave it for longer, as it may damage the enamel on sanitary ware.

Excellent product, I used it in a toilet bowl with limescale and grime. I had emptied the water and left it overnight. In the morning, it was like new

Very good product. I use it, apart from the toilet bowl of course, to clean the joints of the tiles

The best for grime! It tackled a spot in the toilet that I couldn't reach well with a sponge, and I used this specific product locally. I removed the water, applied a sufficient amount to the specific areas, and let it sit. After 10 minutes, pieces were coming off! I haven't tried a better product.
upd: I also used it for joints, and there was no need to scrub for the yellowing to go away (not the mold). Excellent.