Appointy is good for small businesses looking to outsource some admin work and get appointment bookings done online, especially if you don't have a huge client base. You can input the individual client's name in the system so it helps to personalize your services. It's not so suitable for larger companies. It's a good price for small businesses. Sometimes the design can be a bit clunky and the user interface isn't perfect, but for the price and google integration it's well worth it.
We didn't evaluate any other products as we weren't actively looking for such a product. This is a product that is not directly part of our core business but proved to be a good match with an issue that we unknowingly had. Only after an enthusiast colleague showed the demo did we find out that there was an issue that many colleagues experienced.