These do a great job of squelching my heartburn pretty quickly. I only get heartburn on the occasion. Usually I suffer heartburn perhaps once every two weeks but it seems like once I get it, it takes a day or two for it to settle down. I like these Tums in the berries because you can get a huge container of them which makes the price not so bad when you consider how many Tums you're getting. I also like the flip top on these because they seem to stay fresher longer than with the ones in the roll. The chewable part makes them a little harder to get down because they're kind of chalky and they dry your mouth out while you're chewing them up, plus the taste isn't amazing. The taste actually isn't too bad. It kind of tastes like off brand candy or old Halloween candy. It isn't bad necessarily, but it leaves an odd taste in your mouth and isn't something you just want to eat because it tastes good. all that aside though, for mild to moderate heartburn, these are great for me. They do a good job with usually two tablets but occasionally I'll chew three. Within three minutes my heartburn feels as if it's no longer crawling up my throat. It starts to feel less and less close to coming up my esophagus. It takes a few more minutes to settle things completely but ultimately it keeps the acid toned down. I have noticed when the heartburn is really bad though, I still feel a little queasy and heartburny in my stomach but it doesn't reach my throat. Chewing 2-3 once usually does the trick for me. Sometimes if I've eaten something harsh like Mexican salsa, my heartburn will recur again the next day but 2-3 chewable is all it takes for tone my heartburn down or take it out completely for the rest of the day. Effectiveness I gotta say, for me, these go to work pretty quickly. They settle the acid so my throat and mouth aren't on fire and stinging. I like that they have calcium and that the taste isn't unbearable. I'd say these are best for people like me who have mild to moderate heartburn after eating spicy or acidic foods. Ease of Use Very easy to use but a little chalky and sometimes hard to get chewed up. Sometimes I cheat and use a little water to get the particles down because they dry my mouth out. Immediacy Takes a couple minutes and sometimes it just sort of tones the heartburn down but overall pretty immediate relief.