The phrase "good alternative" refers to something that serves as a suitable replacement or substitute for another thing. It suggests that there is an option available that can fulfill the same purpose, but may have different characteristics or benefits compared to what it is replacing. The term implies that this alternative is beneficial and preferable in some way, whether because of its cost, convenience, effectiveness, or other factors. Overall, "good alternative" means there is a viable option available for those seeking an alternative to something else.