I believe I am using current version of wp. Let me first say the calendar display is very nice and can be customized. Looks very good. Also, the admin panel is easy to use. Yes you only get two service types with the free version. I would also like to say that I want to use this plugin. But the paypal button which appears for paid services is unreadable. It's a super light gray with white lettering and is very hard to read. On top of that, the paypal button appears once the client has just booked which is awkward. Thanks.
Update: Okay - copied the css to make the paypal button more presentable. So I have updated the review to show 4 stars. I would like to see if the submit button could go directly to paypal instead of a 2nd button showing for payment. Thanks.