LunaCal is an incredibly complete, professional tool with impeccable design. What I like most is the freedom it offers to customize it with my personal brand; it's very attractive and allows for adding details that make scheduling an appointment a much more special experience.
Compared to other options on the market, which are usually very expensive and don't offer these same features, LunaCal stands out for its excellent value for money. It has undoubtedly been one of my best investments. I am currently on tier 2, but I regret not having chosen tier 3 from the beginning; I hope it becomes available again so I can upgrade.