I bought this (relatively expensive) caulk solely on the reviews of others, and I have to say that this is the best caulk that I've ever used. It works nice, looks great when setup, and it does have the ability to fill fairly large gaps without cracking over time -- I've personally used it on gaps up to 1/4". Used with a high-quality drip-less gun, this is the ticket. It costs more, but caulking isn't something that you want to redo after it cracks 5 years down the road. Highly recommended.