I know it's not very interesting to talk about pricing, but that's really my main criteria since I manage a bunch of properties. Kigo and Guesty take between 3 and 5% of my booking income, which amounts to a LOT of cash. Tokeet uses a flat monthly fee, and it's only a few dollars per property. I'm saving a lot of money every month just by using them. It has all the same features too so I'm not sure why they're not more popular.

The developers are consistent with updating new features and customer support is very responsive.

The calendar for sure. I know that's a common feature for these apps but it's amazing to me. I'm also using triggers for most of my Emails, especially for checkout follow ups. This has been great for us because we get a lot more repeat customers and awesome reviews now.