I had to resist the temptation to title this review something like, "The Works - Stuff That Works!" The reviewer in me voted against it, but the happy user still thinks this product needs to be praised in some extraordinary manner. Because it does work!
Anyway. This tub and shower cleaner comes in a spray bottle and works on contact, killing water stains the moment you spray it on the tub or shower surface. I still have to do some rubbing with a sponge, but no very hard, and I can just see the staining dissolve and my tub and shower turn spotless white. All I have left to do is rinse the cleaner off, and I'm done. The results are quick, impressive, and long-lasting.
The Works needs to be used with caution, as its vapors and the cleaner itself can cause irritation. I have not had that happen, but I always try not to breathe in too deep when I use this product; it does smell rather strong when first applied. Having the area well ventilated also helps.