I was surprised to find out how great a bargain these are. They have a faint lemon smell which is nice but without being over-powering. I have had them in my toilet for almost 3 weeks now & they are still flushing blue! I did notice that they are not getting too mushy which a lot of these type products do. One other thing that impressed me is they are a bit smaller that the more commercial brands. I always had a problem with them “floating” and making a mess. These seem to stay in place just fine. One more tidbit is their customer service is top notch. I wrote to ask them if they were safe for septic systems (they are!) and they promptly responded.